diff --git a/src/01-functions.js b/src/01-functions.js
index 8d772b6a..7755f5ba 100644
--- a/src/01-functions.js
+++ b/src/01-functions.js
@@ -9,7 +9,9 @@
  *  alwaysTrue();
  *  //> true
  */
-function alwaysTrue() {}
+ function alwaysTrue() {
+  return true
+}
 
 /**
  * greet()
@@ -24,7 +26,9 @@ function alwaysTrue() {}
  *  greet("Ian");
  *  //> "Hello, Ian."
  */
-function greet() {}
+function greet(name) {
+  return `Hello, ${name}.`
+}
 
 /**
  * add()
@@ -39,7 +43,9 @@ function greet() {}
  *  add(10, 20);
  *  //> 30
  */
-function add() {}
+function add(a, b) {
+  return a + b
+}
 
 /**
  * multiply()
@@ -54,7 +60,9 @@ function add() {}
  *  multiply(2, 5);
  *  //> 10
  */
-function multiply() {}
+function multiply(a, b) {
+  return a * b
+}
 
 /**
  * average()
@@ -74,7 +82,9 @@ function multiply() {}
  *  average(10, 6);
  *  //> 8 // 10 + 6 = 16; 16/2 = 8;
  */
-function average() {}
+function average(a, b) {
+  return (a + b) / 2
+}
 
 /**
  * averageThree()
@@ -93,7 +103,9 @@ function average() {}
  *  averageThree(10, 11, 19);
  *  //> 10 // 10 + 11 + 19 = 30; 30 / 3 = 10;
  */
-function averageThree() {}
+function averageThree(a, b, c) {
+  return (a+b+c)/3
+}
 
 /**
  * compareTypes()
@@ -112,7 +124,11 @@ function averageThree() {}
  *  compareTypes("left", 10);
  *  //> false
  */
-function compareTypes() {}
+function compareTypes(a, b) {
+  if (typeof(a) === typeof(b)){
+    return true
+  } else return false
+}
 
 /**
  * flipSign()
@@ -131,7 +147,9 @@ function compareTypes() {}
  *  flipSign(50);
  *  //> -50
  */
-function flipSign() {}
+function flipSign(a) {
+  return -1 * a
+}
 
 /**
  * joinStringsWithSpaces()
@@ -151,7 +169,9 @@ function flipSign() {}
  *  joinStringsWithSpaces("left", "right", "up", "down", "away");
  *  //> "left right up down away"
  */
-function joinStringsWithSpaces() {}
+function joinStringsWithSpaces(a,b,c,d,e) {
+  return `${a} ${b} ${c} ${d} ${e}`
+}
 
 /**
  * getFirstAndLastCharacter()
@@ -168,7 +188,9 @@ function joinStringsWithSpaces() {}
  *  getFirstAndLastCharacter("upwards");
  *  //> "us"
  */
-function getFirstAndLastCharacter() {}
+function getFirstAndLastCharacter(a) {
+  return `${a[0]}${a[a.length -1]}`
+}
 
 // Do not change the code below.
 module.exports = {
diff --git a/src/02-data-types.js b/src/02-data-types.js
index 79cf96cf..4f96e513 100644
--- a/src/02-data-types.js
+++ b/src/02-data-types.js
@@ -9,7 +9,9 @@
  *  getLengthOfString("down");
  *  //> 4
  */
-function getLengthOfString(str) {}
+ function getLengthOfString(str) {
+  return str.length
+}
 
 /**
  * convertToNumber()
@@ -22,7 +24,9 @@ function getLengthOfString(str) {}
  *  convertToNumber("111");
  *  //> 111
  */
-function convertToNumber(val) {}
+function convertToNumber(val) {
+  return Number(val)
+}
 
 /**
  * convertToString()
@@ -36,7 +40,9 @@ function convertToNumber(val) {}
  *  convertToString(99);
  *  //> "99"
  */
-function convertToString(val) {}
+function convertToString(val) {
+return String(val)
+}
 
 /**
  * convertToShoutingText()
@@ -49,7 +55,9 @@ function convertToString(val) {}
  *  convertToShoutingText("Hello There");
  *  //> "HELLO THERE"
  */
-function convertToShoutingText(text) {}
+function convertToShoutingText(text) {
+  return text.toUpperCase()
+}
 
 /**
  * convertToWhisperText()
@@ -62,7 +70,9 @@ function convertToShoutingText(text) {}
  *  convertToWhisperText("Hello There");
  *  //> "hello there"
  */
-function convertToWhisperText(text) {}
+function convertToWhisperText(text) {
+  return text.toLowerCase()
+}
 
 /**
  * checkIfCharacterIsInString()
@@ -79,7 +89,14 @@ function convertToWhisperText(text) {}
  *  checkIfCharacterIsInString("hello there", "a");
  *  //> false
  */
-function checkIfCharacterIsInString(text, character) {}
+function checkIfCharacterIsInString(text, character) {
+  // for (let i = 0; i < text.length; i++){
+  //   if (text[i] === character){
+  //     return true
+  //   } else return false
+  // } 
+  return text.includes(character)
+}
 
 /**
  * isEven()
@@ -95,7 +112,11 @@ function checkIfCharacterIsInString(text, character) {}
  *  isEven(11);
  *  //> false
  */
-function isEven(num) {}
+function isEven(num) {
+  if (num % 2 === 0){
+    return true
+  } else return false
+}
 
 /**
  * isOdd()
@@ -111,7 +132,11 @@ function isEven(num) {}
  *  isOdd(11);
  *  //> true
  */
-function isOdd(num) {}
+function isOdd(num) {
+  if (num % 2 === 1){
+    return true
+  } else return false
+}
 
 /**
  * isTruthy()
@@ -127,7 +152,11 @@ function isOdd(num) {}
  *  isTruthy(null);
  *  //> false
  */
-function isTruthy(val) {}
+function isTruthy(val) {
+  if (val && val){
+    return true
+  } else return false
+}
 
 /**
  * isFalsy()
@@ -143,7 +172,11 @@ function isTruthy(val) {}
  *  isFalsy(" ");
  *  //> false
  */
-function isFalsy(val) {}
+function isFalsy(val) {
+  if (val && val){
+    return false
+  } else return true
+}
 
 // Do not change the code below.
 module.exports = {
diff --git a/src/03-control-flow.js b/src/03-control-flow.js
index 8f675935..2392ebeb 100644
--- a/src/03-control-flow.js
+++ b/src/03-control-flow.js
@@ -14,7 +14,11 @@
  *  isEqual(10, "10");
  *  //> false
  */
-function isEqual(a, b) {}
+ function isEqual(a, b) {
+  if (a === b){
+    return true
+  } else return false
+}
 
 /**
  * findLarger()
@@ -28,7 +32,11 @@ function isEqual(a, b) {}
  *  findLarger(19, 7);
  *  //> 19
  */
-function findLarger(a, b) {}
+function findLarger(a, b) {
+  if (a > b){
+    return a
+  } else return b
+}
 
 /**
  * findLargerOrTie()
@@ -45,7 +53,13 @@ function findLarger(a, b) {}
  *  findLargerOrTie(0, 0);
  *  //> "tie"
  */
-function findLargerOrTie(a, b) {}
+function findLargerOrTie(a, b) {
+  if (a > b){
+    return a
+  } else if (a === b){
+    return "tie"
+  } else return b
+}
 
 /**
  * positiveNegativeOrZero()
@@ -65,7 +79,15 @@ function findLargerOrTie(a, b) {}
  *  positiveNegativeOrZero(1);
  *  //> "Positive"
  */
-function positiveNegativeOrZero(a) {}
+function positiveNegativeOrZero(a) {
+  if (Math.sign(a) === 1){
+    return 'Positive'
+  } else if (Math.sign(a) === -1){
+    return 'Negative'
+  } else if (a === 0){
+    return 'Zero'
+  }
+}
 
 /**
  * aroundTheWorldGreeting()
@@ -86,7 +108,15 @@ function positiveNegativeOrZero(a) {}
  *  aroundTheWorldGreeting();
  *  //> "Hello World"
  */
-function aroundTheWorldGreeting(language) {}
+function aroundTheWorldGreeting(language) {
+  if (language === 'english'){
+    return "Hello World"
+  } else if (language === 'spanish'){
+    return "Hola Mundo"
+  } else if (language === 'german'){
+    return "Hallo Welt"
+  } else return "Hello World"
+}
 
 /**
  * aroundTheWorldGreetingWithSwitch()
@@ -109,7 +139,21 @@ function aroundTheWorldGreeting(language) {}
  *  aroundTheWorldGreetingWithSwitch();
  *  //> "Hello World"
  */
-function aroundTheWorldGreetingWithSwitch(language) {}
+function aroundTheWorldGreetingWithSwitch(language) {
+  let myDefault = "Hello World"
+
+  switch (language){
+    case "english": 
+    myDefault = "Hello World";
+    break;
+    case "spanish":
+      myDefault = "Hola Mundo";
+      break;
+    case "german":
+      myDefault = "Hallo Welt";
+      break;
+  } return myDefault
+}
 
 /**
  * calculateLetterGrade()
@@ -128,7 +172,17 @@ function aroundTheWorldGreetingWithSwitch(language) {}
  *  calculateLetterGrade(99);
  *  //> "A"
  */
-function calculateLetterGrade(grade) {}
+function calculateLetterGrade(grade) {
+  if (grade >= 90){
+    return "A"
+  } else if (grade >= 80){
+    return "B"
+  } else if (grade >= 70){
+    return "C"
+  } else if (grade >= 60){
+    return "D"
+  } else return "F"
+}
 
 /**
  * animalCounts()
@@ -146,7 +200,11 @@ function calculateLetterGrade(grade) {}
  *  animalCounts("pig", 1);
  *  //> "1 pig"
  */
-function animalCounts(animal, numberOfAnimals) {}
+function animalCounts(animal, numberOfAnimals) {
+  if (numberOfAnimals > 1){
+    return `${numberOfAnimals} ${animal}s`
+  } else return `${numberOfAnimals} ${animal}`
+}
 
 /**
  * evenOrOdd()
@@ -163,7 +221,11 @@ function animalCounts(animal, numberOfAnimals) {}
  *  evenOrOdd(48);
  *  //> "Even"
  */
-function evenOrOdd(a) {}
+function evenOrOdd(a) {
+  if (a % 2 === 0){
+    return `Even`
+  } else return "Odd"
+}
 
 /**
  * evenOrOddWithTernary()
@@ -179,7 +241,9 @@ function evenOrOdd(a) {}
  *  evenOrOddWithTernary(8);
  *  //> "Even"
  */
-function evenOrOddWithTernary(a) {}
+function evenOrOddWithTernary(a) {
+return a % 2 === 0 ? "Even" : "Odd"
+}
 
 // Do not change any code below this line.
 module.exports = {
diff --git a/src/04-arrays.js b/src/04-arrays.js
index 5317f7c3..ecf9b01a 100644
--- a/src/04-arrays.js
+++ b/src/04-arrays.js
@@ -10,7 +10,9 @@
  *  createEmptyArray();
  *  //> []
  */
-function createEmptyArray() {}
+ function createEmptyArray() {
+  return [ ]
+}
 
 /**
  * createArrayWithTwoElements()
@@ -24,7 +26,9 @@ function createEmptyArray() {}
  *  createArrayWithTwoElements(true, false);
  *  //> [ true, false ]
  */
-function createArrayWithTwoElements(a, b) {}
+function createArrayWithTwoElements(a, b) {
+  return [a,b]
+}
 
 /**
  * getArrayLength()
@@ -37,7 +41,9 @@ function createArrayWithTwoElements(a, b) {}
  *  getArrayLength([ 10, 20, 30 ]);
  *  //> 3
  */
-function getArrayLength(array) {}
+function getArrayLength(array) {
+  return array.length
+}
 
 /**
  * getFirstElementOfArray()
@@ -51,7 +57,9 @@ function getArrayLength(array) {}
  *  getFirstElementOfArray([ 10, 20, 30 ]);
  *  //> 10
  */
-function getFirstElementOfArray(array) {}
+function getFirstElementOfArray(array) {
+  return array[0]
+}
 
 /**
  * getLastElementOfArray()
@@ -65,7 +73,9 @@ function getFirstElementOfArray(array) {}
  *  getLastElementOfArray([ null, undefined ]);
  *  //> undefined
  */
-function getLastElementOfArray(array) {}
+function getLastElementOfArray(array) {
+  return array[array.length -1]
+}
 
 /**
  * addElementToEndOfArray()
@@ -79,7 +89,10 @@ function getLastElementOfArray(array) {}
  *  addElementToEndOfArray([ 10 ], 9);
  *  //> [ 10, 9 ]
  */
-function addElementToEndOfArray(array, element) {}
+function addElementToEndOfArray(array, element) {
+  array.push(element)
+  return array
+}
 
 /**
  * removeElementFromEndOfArray()
@@ -92,7 +105,9 @@ function addElementToEndOfArray(array, element) {}
  *  removeElementFromEndOfArray([ 10, 9, 8 ]);
  *  //> 8
  */
-function removeElementFromEndOfArray(array) {}
+function removeElementFromEndOfArray(array) {
+  return array.pop()
+}
 
 /**
  * addElementToFrontOfArray()
@@ -106,7 +121,10 @@ function removeElementFromEndOfArray(array) {}
  *  addElementToFrontOfArray([ 10 ], 9);
  *  //> [ 9, 10 ]
  */
-function addElementToFrontOfArray(array, element) {}
+function addElementToFrontOfArray(array, element) {
+  array.unshift(element);
+  return array
+}
 
 /**
  * removeElementFromFrontOfArray()
@@ -119,7 +137,9 @@ function addElementToFrontOfArray(array, element) {}
  *  removeElementFromFrontOfArray([ 10, 9, 8 ]);
  *  //> 10
  */
-function removeElementFromFrontOfArray(array) {}
+function removeElementFromFrontOfArray(array) {
+  return array.shift()
+}
 
 /**
  * getMiddleElement()
@@ -135,7 +155,9 @@ function removeElementFromFrontOfArray(array) {}
  *  getMiddleElement([ 10, null, "30" ]);
  *  //> null
  */
-function getMiddleElement(array) {}
+function getMiddleElement(array) {
+  return array[(Math.floor(array.length/2))]
+}
 
 // Do not change any code below this line.
 module.exports = {
diff --git a/src/05-objects.js b/src/05-objects.js
index 3e97313c..67efa984 100644
--- a/src/05-objects.js
+++ b/src/05-objects.js
@@ -9,7 +9,9 @@
  *  createEmptyObject()
  *  //> {}
  */
-function createEmptyObject() {}
+ function createEmptyObject() {
+  return { }
+}
 
 /**
  * createObjectWithValue()
@@ -22,7 +24,9 @@ function createEmptyObject() {}
  *  createObjectWithValue(19);
  *  //> { whateverKey: 19 }
  */
-function createObjectWithValue(val) {}
+function createObjectWithValue(val) {
+  return {any:val}
+}
 
 /**
  * createObjectWithKey()
@@ -35,7 +39,9 @@ function createObjectWithValue(val) {}
  *  createObjectWithKey("left");
  *  //> { left: false }
  */
-function createObjectWithKey(key) {}
+function createObjectWithKey(key) {
+  return {[key]:true}
+}
 
 /**
  * createObjectWithKeyValuePair()
@@ -49,7 +55,9 @@ function createObjectWithKey(key) {}
  *  createObjectWithKeyValuePair("left", "right");
  *  //> { left: "right" }
  */
-function createObjectWithKeyValuePair(key, val) {}
+function createObjectWithKeyValuePair(key, val) {
+  return {[key]:val}
+}
 
 /**
  * getNameFromObject()
@@ -62,7 +70,9 @@ function createObjectWithKeyValuePair(key, val) {}
  *  getNameFromObject({ name: "Jay" });
  *  //> "Jay"
  */
-function getNameFromObject(object) {}
+function getNameFromObject(object) {
+  return object.name
+}
 
 /**
  * getAgeFromObject()
@@ -75,7 +85,9 @@ function getNameFromObject(object) {}
  *  getAgeFromObject({ age: 30 });
  *  //> 30
  */
-function getAgeFromObject(object) {}
+function getAgeFromObject(object) {
+  return object.age
+}
 
 /**
  * addValueToObject()
@@ -89,7 +101,10 @@ function getAgeFromObject(object) {}
  *  addValueToObject({ left: true }, false);
  *  //> { left: true, key: false }
  */
-function addValueToObject(object, val) {}
+function addValueToObject(object, val) {
+  object['newValue'] = val
+  return object
+}
 
 /**
  * addKeyToObject()
@@ -103,7 +118,10 @@ function addValueToObject(object, val) {}
  *  addKeyToObject({ right: false }, "left");
  *  //> { right: false, left: true }
  */
-function addKeyToObject(object, key) {}
+function addKeyToObject(object, key) {
+  object[key] = true
+  return object
+}
 
 /**
  * addKeyValuePairToObject()
@@ -118,7 +136,10 @@ function addKeyToObject(object, key) {}
  *  addKeyValuePairToObject({ up: true }, "left", false);
  *  //> { up: true, left: false }
  */
-function addKeyValuePairToObject(object, key, val) {}
+function addKeyValuePairToObject(object, key, val) {
+  object[key] = val
+  return object
+}
 
 /**
  * deleteKeyFromObject()
@@ -132,7 +153,10 @@ function addKeyValuePairToObject(object, key, val) {}
  *  deleteKeyFromObject({ left: true, right: false }, "left");
  *  //> { right: false }
  */
-function deleteKeyFromObject(object, key) {}
+function deleteKeyFromObject(object, key) {
+  delete object[key]
+  return object
+}
 
 // Do not change any code below this line.
 module.exports = {
diff --git a/src/06-loops.js b/src/06-loops.js
index 1116cc27..97a1492b 100644
--- a/src/06-loops.js
+++ b/src/06-loops.js
@@ -11,172 +11,245 @@
  *  //> 25
  *  (3 + 4 + 5 + 6 + 7 = 25)
  */
-function rangeSum(min, max) {}
-
-/**
- * rangeOdd()
- * ---------------------
- * Takes in range (inclusive) and returns an array in decreasing order of only the odd numbers in that range.
- * @param {number} min
- * @param {number} max
- * @returns {number[]}
- *
- * EXAMPLE:
- *  rangeOdd(10, 15);
- *  //> [ 15, 13, 11 ]
- */
-function rangeOdd(min, max) {}
-
-/**
- * rangeEveryOther()
- * ---------------------
- * Takes in range (inclusive) and returns an array in increasing order of only every other element. Start by including the first number.
- * @param {number} min
- * @param {number} max
- * @returns {number[]}
- *
- * EXAMPLE:
- *  rangeEveryOther(11, 18);
- *  //> [ 11, 13, 15, 17 ]
- */
-function rangeEveryOther(min, max) {}
-
-/**
- * containsWhileLoop()
- * ---------------------
- * Returns whether or not the `target` value exists in the array.
- *
- * NOTE: Must be written with a `while` loop.
- *
- * NOTE: Must NOT contain the `.includes()` method.
- *
- * @param {*[]} array
- * @param {number|string} target
- * @returns {boolean}
- *
- * EXAMPLE:
- *  containsWhileLoop([ 5, 2, 4 ], 4);
- *  //> true
- *
- *  containsWhileLoop([ "left", "up", "right" ], "down");
- *  //> false
- */
-function containsWhileLoop(array, target) {}
-
-/**
- * containsForLoop()
- * ---------------------
- * Returns whether or not the `target` value exists in the array.
- *
- * NOTE: Must be written with a `for` loop.
- *
- * NOTE: Must NOT contain the `.includes()` method.
- *
- * @param {*[]} array
- * @param {number|string} target
- * @returns {boolean}
- *
- * EXAMPLE:
- *  containsForLoop([ 5, 2, 4 ], 4);
- *  //> true
- *
- *  containsForLoop([ "left", "up", "right" ], "down");
- *  //> false
- */
-function containsForLoop(array, target) {}
-
-/**
- * targetCount()
- * ---------------------
- * Returns how many times the `target` occurs in the array.
- * @param {*[]} array
- * @param {number|string} target
- * @returns {number}
- *
- * EXAMPLE:
- *  targetCount([ 10, 20, 10, 20, 30 ], 10);
- *  //> 2
- */
-function targetCount(array, target) {}
-
-/**
- * firstIndexFound()
- * ---------------------
- * Returns the first index that the `target` is found at in the array. If the `target` is not found, it should return `-1`.
- *
- * NOTE: You may NOT use the `.indexOf()` method.
- *
- * @param {*[]} array
- * @param {number|string} target
- * @returns {number}
- *
- * EXAMPLE:
- *  firstIndexFound([ "left", "right", "left" ], "left");
- *  //> 0
- *
- *  firstIndexFound([ "left", "right", "left" ], "up");
- *  //> -1
- */
-function firstIndexFound(array, target) {}
-
-/**
- * lastIndexFound()
- * ---------------------
- * Returns the last index that the `target` is found at in the array. If the `target` is not found, it should return `-1`.
- *
- * NOTE: You may NOT use the `.indexOf()` method.
- *
- * @param {*[]} array
- * @param {number|string} target
- * @returns {number}
- *
- * EXAMPLE:
- *  lastIndexFound([ "left", "right", "left" ], "left");
- *  //> 2
- *
- *  lastIndexFound([ "left", "right", "left" ], "up");
- *  //> -1
- */
-function lastIndexFound(array, target) {}
-
-/**
- * timesIndex()
- * ---------------------
- * Returns a new array where each element has been multiplied by its index.
- * @param {number[]} elements
- * @returns {number[]}
- *
- * EXAMPLE:
- *  timesIndex([ 7, 10, 11 ]);
- *  //> [ 7 * 0, 10 * 1, 11 * 2 ]
- *  //> [ 0, 10, 22 ]
- */
-function timesIndex(array) {}
-
-/**
- * cumulativeSum()
- * ---------------------
- * Returns a new array where each element is the cumulative sum in the array, up until that point.
- * @param {number[]} array
- * @returns {number[]}
- *
- * EXAMPLE:
- *  cumulativeSum([ 5, 2, 9 ]);
- *  //> [ 5, 5 + 2, 5 + 2 + 9 ]
- *  //> [ 5, 7, 16 ]
- */
-function cumulativeSum(array) {}
-
-// Do not change anything below this line.
-module.exports = {
-  rangeSum,
-  rangeOdd,
-  rangeEveryOther,
-  containsWhileLoop,
-  containsForLoop,
-  targetCount,
-  firstIndexFound,
-  lastIndexFound,
-  timesIndex,
-  cumulativeSum,
-};
+ function rangeSum(min, max) {
+  let addedSum = 0
+  for (let i = min; i <= max; i++){
+     addedSum = i + addedSum
+  } return addedSum
+  }
+  
+  /**
+   * rangeOdd()
+   * ---------------------
+   * Takes in range (inclusive) and returns an array in decreasing order of only the odd numbers in that range.
+   * @param {number} min
+   * @param {number} max
+   * @returns {number[]}
+   *
+   * EXAMPLE:
+   *  rangeOdd(10, 15);
+   *  //> [ 15, 13, 11 ]
+   */
+  function rangeOdd(min, max) {
+    let newArray = []
+    for (let i = max; i >= min; i --){
+      if (i % 2 === 1){
+        newArray.push(i)
+      } 
+    } return newArray
+  }
+  
+  /**
+   * rangeEveryOther()
+   * ---------------------
+   * Takes in range (inclusive) and returns an array in increasing order of only every other element. Start by including the first number.
+   * @param {number} min
+   * @param {number} max
+   * @returns {number[]}
+   *
+   * EXAMPLE:
+   *  rangeEveryOther(11, 18);
+   *  //> [ 11, 13, 15, 17 ]
+   */
+  function rangeEveryOther(min, max) {
+    let wastedNumber = [ ] 
+    let startArray = [ ] 
+    
+    for (let i = min; i <= max; i ++){
+      if (i === min){
+        startArray.push(i)
+      } else if (startArray.length != wastedNumber.length){
+        wastedNumber.push(i)
+      } else startArray.push(i)
+    } return startArray
+  }
+  
+  /**
+   * containsWhileLoop()
+   * ---------------------
+   * Returns whether or not the `target` value exists in the array.
+   *
+   * NOTE: Must be written with a `while` loop.
+   *
+   * NOTE: Must NOT contain the `.includes()` method.
+   *
+   * @param {*[]} array
+   * @param {number|string} target
+   * @returns {boolean}
+   *
+   * EXAMPLE:
+   *  containsWhileLoop([ 5, 2, 4 ], 4);
+   *  //> true
+   *
+   *  containsWhileLoop([ "left", "up", "right" ], "down");
+   *  //> false
+   */
+  function containsWhileLoop(array, target) {
+    let i = 0
+    while (i < array.length){
+      if (array[i] === target){
+        return true
+      } else i++
+    } return false
+  }
+  
+  /**
+   * containsForLoop()
+   * ---------------------
+   * Returns whether or not the `target` value exists in the array.
+   *
+   * NOTE: Must be written with a `for` loop.
+   *
+   * NOTE: Must NOT contain the `.includes()` method.
+   *
+   * @param {*[]} array
+   * @param {number|string} target
+   * @returns {boolean}
+   *
+   * EXAMPLE:
+   *  containsForLoop([ 5, 2, 4 ], 4);
+   *  //> true
+   *
+   *  containsForLoop([ "left", "up", "right" ], "down");
+   *  //> false
+   */
+  function containsForLoop(array, target) {
+    for (let i = 0; i < array.length; i++){
+      if (array[i] === target){
+        return true
+      } 
+    } return false
+  }
+  
+  /**
+   * targetCount()
+   * ---------------------
+   * Returns how many times the `target` occurs in the array.
+   * @param {*[]} array
+   * @param {number|string} target
+   * @returns {number}
+   *
+   * EXAMPLE:
+   *  targetCount([ 10, 20, 10, 20, 30 ], 10);
+   *  //> 2
+   */
+  function targetCount(array, target) {
+    let targetCounts = 0
+    for (let i = 0; i < array.length; i++){
+      if (array[i] === target){
+        targetCounts ++
+      }
+    }return targetCounts
+  }
+  
+  /**
+   * firstIndexFound()
+   * ---------------------
+   * Returns the first index that the `target` is found at in the array. If the `target` is not found, it should return `-1`.
+   *
+   * NOTE: You may NOT use the `.indexOf()` method.
+   *
+   * @param {*[]} array
+   * @param {number|string} target
+   * @returns {number}
+   *
+   * EXAMPLE:
+   *  firstIndexFound([ "left", "right", "left" ], "left");
+   *  //> 0
+   *
+   *  firstIndexFound([ "left", "right", "left" ], "up");
+   *  //> -1
+   */
+  function firstIndexFound(array, target) {
+    firstIndex = 0
+    for (let i = 0; i < array.length; i++){
+      if (array[i] === target){
+        firstIndex = i
+        return firstIndex
+      } 
+    } return -1
+  }
+  
+  /**
+   * lastIndexFound()
+   * ---------------------
+   * Returns the last index that the `target` is found at in the array. If the `target` is not found, it should return `-1`.
+   *
+   * NOTE: You may NOT use the `.indexOf()` method.
+   *
+   * @param {*[]} array
+   * @param {number|string} target
+   * @returns {number}
+   *
+   * EXAMPLE:
+   *  lastIndexFound([ "left", "right", "left" ], "left");
+   *  //> 2
+   *
+   *  lastIndexFound([ "left", "right", "left" ], "up");
+   *  //> -1
+   */
+  function lastIndexFound(array, target) {
+    let lastIndex = 0
+    for (let i = array.length; i > 0; i--){
+      if (array[i] === target){
+        lastIndex = i
+        return lastIndex
+      } 
+    } return -1
+  }
+  
+  /**
+   * timesIndex()
+   * ---------------------
+   * Returns a new array where each element has been multiplied by its index.
+   * @param {number[]} elements
+   * @returns {number[]}
+   *
+   * EXAMPLE:
+   *  timesIndex([ 7, 10, 11 ]);
+   *  //> [ 7 * 0, 10 * 1, 11 * 2 ]
+   *  //> [ 0, 10, 22 ]
+   */
+  function timesIndex(array) {
+    multipliedIndexArr = []
+    for (let i = 0; i < array.length; i++){
+      multipliedIndexArr.push(array[i] * i)
+    } return multipliedIndexArr
+  }
+  
+  /**
+   * cumulativeSum()
+   * ---------------------
+   * Returns a new array where each element is the cumulative sum in the array, up until that point.
+   * @param {number[]} array
+   * @returns {number[]}
+   *
+   * EXAMPLE:
+   *  cumulativeSum([ 5, 2, 9 ]);
+   *  //> [ 5, 5 + 2, 5 + 2 + 9 ]
+   *  //> [ 5, 7, 16 ]
+   */
+  function cumulativeSum(array) {
+    newArr = []
+    newNum = 0
+    for (let i = 0; i < array.length; i++){
+      newNum += array[i]
+      newArr.push(newNum)
+      }
+     return newArr
+  }
+  
+  // Do not change anything below this line.
+  module.exports = {
+    rangeSum,
+    rangeOdd,
+    rangeEveryOther,
+    containsWhileLoop,
+    containsForLoop,
+    targetCount,
+    firstIndexFound,
+    lastIndexFound,
+    timesIndex,
+    cumulativeSum,
+  };
+  
\ No newline at end of file
diff --git a/src/07-even-more-loops.js b/src/07-even-more-loops.js
index 250fde4a..f81532d4 100644
--- a/src/07-even-more-loops.js
+++ b/src/07-even-more-loops.js
@@ -12,7 +12,11 @@
  *  shoutForLoop([ "A", "Very", "Happy", "Array" ]);
  *  //> [ "A!", "Very!", "Happy!", "Array!" ];
  */
-function shoutForLoop(array) {}
+ function shoutForLoop(array) {
+  for (let i = 0; i < array.length; i++){
+    array[i] += "!"
+  } return array
+}
 
 /**
  * shoutWhileLoop()
@@ -28,7 +32,13 @@ function shoutForLoop(array) {}
  *  shoutWhileLoop([ "A", "Very", "Happy", "Array" ]);
  *  //> [ "A!", "Very!", "Happy!", "Array!" ];
  */
-function shoutWhileLoop(array) {}
+function shoutWhileLoop(array) {
+  let i = 0
+  while(i < array.length){
+    array[i] += "!"
+    i++
+  } return array
+}
 
 /**
  * shoutForOfLoop()
@@ -44,7 +54,13 @@ function shoutWhileLoop(array) {}
  *  shoutForOfLoop([ "A", "Very", "Happy", "Array" ]);
  *  //> [ "A!", "Very!", "Happy!", "Array!" ];
  */
-function shoutForOfLoop(array) {}
+function shoutForOfLoop(array) {
+let newArr = []
+for (let value of array) {
+  value += "!";
+  newArr.push(value)
+} return newArr
+}
 
 /**
  * sumArray()
@@ -57,7 +73,12 @@ function shoutForOfLoop(array) {}
  *  sumArray([ 10, 0, 10, 11 ]);
  *  //> 31
  */
-function sumArray(array) {}
+function sumArray(array) {
+  let total = 0
+  for (let i = 0; i < array.length; i++){
+    total += array[i]
+  } return total 
+}
 
 /**
  * oddArray()
@@ -70,7 +91,14 @@ function sumArray(array) {}
  *  oddArray([ 11, 15, 20, 22, 37 ]);
  *  //> [ 11, 15, 37 ]
  */
-function oddArray(array) {}
+function oddArray(array) {
+  let oddArr = []
+  for (let i = 0; i < array.length; i++){
+    if (array[i] % 2 === 1){
+      oddArr.push(array[i])
+    }
+  } return oddArr
+}
 
 /**
  * evenArray()
@@ -83,7 +111,14 @@ function oddArray(array) {}
  *  evenArray([ 11, 15, 20, 22, 37 ]);
  *  //> [ 20, 22 ]
  */
-function evenArray(array) {}
+function evenArray(array) {
+  let evenArr = []
+  for (let i = 0; i < array.length; i++){
+    if (array[i] % 2 === 0){
+      evenArr.push(array[i])
+    }
+  } return evenArr
+}
 
 /**
  * findSmallest()
@@ -96,7 +131,14 @@ function evenArray(array) {}
  *  findSmallest([ 0, 11, -2, 5 ]);
  *  //> -2
  */
-function findSmallest(array) {}
+function findSmallest(array) {
+  let smallest = array[0]
+  for (let i = 0; i < array.length; i++){
+    if (array[i] < smallest){
+      smallest = array[i]
+    }
+  } return smallest
+}
 
 /**
  * findLargest()
@@ -109,7 +151,14 @@ function findSmallest(array) {}
  *  findLargest([ 0, 11, -2, 5 ]);
  *  //> 11
  */
-function findLargest(array) {}
+function findLargest(array) {
+  largest = array[0]
+  for (let i = 0; i < array.length; i++){
+    if (array[i] > largest){
+      largest = array[i]
+    }
+  } return largest
+}
 
 /**
  * findEqual()
@@ -126,7 +175,9 @@ function findLargest(array) {}
  *  findEqual([ 0, 11, -2, 5 ], 9);
  *  //> false
  */
-function findEqual(array, selected) {}
+function findEqual(array, selected) {
+  return array.includes(selected)
+}
 
 /**
  * removeDuplicates()
@@ -143,7 +194,14 @@ function findEqual(array, selected) {}
  *  //> [ 1, 11, 2, 3, 4, 9 ]
  */
 
-function removeDuplicates(array) {}
+function removeDuplicates(array) {
+  let newArr = []
+  for (let i = 0; i < array.length; i++){
+    if (!newArr.includes(array[i])){
+      newArr.push(array[i])
+    }
+  } return newArr
+}
 
 // Do not change any code below this line.
 module.exports = {
diff --git a/src/08-accessing.js b/src/08-accessing.js
index 079908aa..0570a100 100644
--- a/src/08-accessing.js
+++ b/src/08-accessing.js
@@ -32,7 +32,9 @@
  *  getFirstName(person);
  *  //> "Rachel"
  */
-function getFirstName(person) {}
+ function getFirstName(person) {
+  return person.names.first
+}
 
 /**
  * getLastName()
@@ -45,7 +47,9 @@ function getFirstName(person) {}
  *  getLastName(person);
  *  //> "Rojas"
  */
-function getLastName(person) {}
+function getLastName(person) {
+  return person.names.last
+}
 
 /**
  * getAddressStreet()
@@ -58,7 +62,9 @@ function getLastName(person) {}
  *  getAddressStreet(person);
  *  //> "697 Pine Drive"
  */
-function getAddressStreet(person) {}
+function getAddressStreet(person) {
+  return person.address.street
+}
 
 /**
  * getCountOfPhoneNumbers()
@@ -71,7 +77,9 @@ function getAddressStreet(person) {}
  *  getCountOfPhoneNumbers(person);
  *  //> 2
  */
-function getCountOfPhoneNumbers(person) {}
+function getCountOfPhoneNumbers(person) {
+  return person.numbers.length
+}
 
 /**
  * getFirstPhoneNumber()
@@ -87,7 +95,9 @@ function getCountOfPhoneNumbers(person) {}
  *  getFirstPhoneNumber(person);
  *  //> 7185550921
  */
-function getFirstPhoneNumber(person) {}
+function getFirstPhoneNumber(person) {
+  return person.numbers[0]
+}
 
 /**
  * getLastPhoneNumber()
@@ -103,7 +113,9 @@ function getFirstPhoneNumber(person) {}
  *  getLastPhoneNumber(person);
  *  //> 7185558611
  */
-function getLastPhoneNumber(person) {}
+function getLastPhoneNumber(person) {
+  return person.numbers[person.numbers.length -1]
+}
 
 /**
  * getFullName()
@@ -116,7 +128,9 @@ function getLastPhoneNumber(person) {}
  *  getFullName(person);
  *  //> "Rachel Eleanor Rojas"
  */
-function getFullName(person) {}
+function getFullName(person) {
+  return `${person.names.first} ${person.names.middle} ${person.names.last}`
+}
 
 /**
  * getCityAndState()
@@ -132,7 +146,9 @@ function getFullName(person) {}
  *  getCityAndState(person);
  *  //> "Staten Island, NY"
  */
-function getCityAndState(person) {}
+function getCityAndState(person) {
+  return `${person.address.city}, ${person.address.state}`
+}
 
 /**
  * getFullAddress()
@@ -148,7 +164,9 @@ function getCityAndState(person) {}
  *  getFullAddress(person);
  *  //> "697 Pine Drive 2A, Staten Island, NY, 10306"
  */
-function getFullAddress(person) {}
+function getFullAddress(person) {
+  return `${person.address.street} ${person.address.unit}, ${person.address.city}, ${person.address.state}, ${person.address.zip}`
+}
 
 /**
  * getFlatObject()
@@ -171,7 +189,31 @@ function getFullAddress(person) {}
       numbers: [7185550921, 7185558611],
     };
  */
-function getFlatObject(person) {}
+function getFlatObject(person) {
+  let first = person.names.first
+  let middle = person.names.middle
+  let last = person.names.last
+  let street = person.address.street
+  let unit = person.address.unit
+  let city = person.address.city
+  let state =  person.address.state
+  let zip =  person.address.zip
+  let numbers = person.numbers
+
+  let newObj = {}
+
+  newObj.first = first
+  newObj.middle = middle
+  newObj.last = last
+  newObj.street = street
+  newObj.unit = unit
+  newObj.city = city
+  newObj.state = state
+  newObj.zip = zip
+  newObj.numbers = numbers
+
+  return newObj
+} 
 
 // Do not change the code below.
 module.exports = {
diff --git a/src/09-word-problems.js b/src/09-word-problems.js
index 2f63d723..a79fc7d7 100644
--- a/src/09-word-problems.js
+++ b/src/09-word-problems.js
@@ -19,7 +19,17 @@
  *  applyDiscount(1000, 9, true);
  *  //> 700
  */
-function applyDiscount(priceInCents, age, hasMembership) {}
+ function applyDiscount(priceInCents, age, hasMembership) {
+  let ageMembership = (age <= 10 || age >= 65)
+  
+  if (hasMembership && (ageMembership)){
+    return priceInCents * .70
+  } else if (hasMembership){
+    return priceInCents * .80
+  } else if (ageMembership){
+    return priceInCents * .90
+  } else return priceInCents
+}
 
 /**
  * getCartTotal()
@@ -40,7 +50,14 @@ function applyDiscount(priceInCents, age, hasMembership) {}
     getCartTotal(cart);
  *  //> "$30.00"
  */
-function getCartTotal(products) {}
+function getCartTotal(products) {
+  let total = 0 
+  // console.log(products)
+  for (let i = 0; i < products.length; i ++){
+    total += products[i].priceInCents * products[i].quantity
+  }
+  return `$${(total/100).toFixed(2)}`
+}
 
 /**
  * compareLocations()
@@ -80,7 +97,15 @@ function getCartTotal(products) {}
     compareLocations(address1, address2);
     //> "Same city."
  */
-function compareLocations(address1, address2) {}
+function compareLocations(address1, address2) {
+  if ((address1.street === address2.street) && (address1.city === address2.city) && (address1.state === address2.state) && (address1.zip === address2.zip)){
+    return "Same building."
+  } else if ((address1.city === address2.city) && (address1.state === address2.state) && (address1.zip === address2.zip)){
+    return "Same city."
+  } else if (address1.state === address2.state){
+    return "Same state."
+  } else return "Addresses are not near each other."
+}
 
 /**
  * gradeAssignments()
@@ -127,7 +152,49 @@ function compareLocations(address1, address2) {}
     //>   },
     //> ];
  */
-function gradeAssignments(assignments) {}
+function gradeAssignments(assignments) {
+  // console.log(assignments)
+  
+  for (let i = 0; i < assignments.length; i++){
+    if ( assignments[i].kind === 'PASS-FAIL'){
+      if (assignments[i].score.received === assignments[i].score.max){
+        assignments[i].status = "PASSED"
+      } else if (assignments[i].score.received !== assignments[i].score.max){
+        assignments[i].status = "FAILED"
+      }
+    } else if (assignments[i].kind === 'PERCENTAGE'){
+      if ((assignments[i].score.received / assignments[i].score.max) >= .80){
+        assignments[i].status = `PASSED: ${((assignments[i].score.received / assignments[i].score.max) * 100).toFixed(1)}%`
+      } else assignments[i].status = `FAILED: ${((assignments[i].score.received / assignments[i].score.max) * 100).toFixed(1)}%`
+    } else assignments[i].status = `SCORE: ${assignments[i].score.received}/${assignments[i].score.max}`
+  }
+  return assignments
+}
+// let newArray = [obj1, obj2, obj3]
+// let obj1 = {}
+// let obj2 = {}
+// let obj3 = {}
+// obj1.kind = 
+// obj1.score = 
+// obj1.kind = 
+
+// obj2.kind = 
+// obj2.kind = 
+// obj2.kind = 
+
+// obj3.kind = 
+// obj3.kind = 
+// obj3.kind = 
+
+// for (let i = 0; i < assignments.length; i++){
+// newAr[i].kind = assignments[i].kind
+// } for (let j = 0; j < assignments.length; j++){
+//   newArray[j].score = assignments[j].score
+// } for (let k = 0; k < assignments.length; k++){
+//   newArray[k].status = assignments[k].score
+// }
+// console.log(newArray)
+// return newArray
 
 /**
  * createLineOrder()
@@ -152,7 +219,20 @@ function gradeAssignments(assignments) {}
     createLineOrder(people);
     //> [ "Ray Anderson", "America Marsh", "Wade Carson", "Patience Patel" ]
  */
-function createLineOrder(people) {}
+function createLineOrder(people) {
+  memberArr = [ ]
+
+ for (let i = 0; i < people.length; i++){
+   if (people[i].hasMembership === true){
+      memberArr.push(people[i].name)
+      } 
+  }
+ for (let j = 0; j < people.length; j++){
+    if (people[j].hasMembership === false){
+      memberArr.push(people[j].name)
+    }
+  } return memberArr
+}
 
 module.exports = {
   applyDiscount,