diff --git a/.gitignore b/.gitignore
index 12ac6472..a664cb32 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules/
-.DS_Store
\ No newline at end of file
+.DS_Store
+random.md
\ No newline at end of file
diff --git a/src/01-functions.js b/src/01-functions.js
index 8d772b6a..be4f32a3 100644
--- a/src/01-functions.js
+++ b/src/01-functions.js
@@ -9,13 +9,15 @@
  *  alwaysTrue();
  *  //> true
  */
-function alwaysTrue() {}
+function alwaysTrue() {
+  return true;
+}
 
 /**
  * greet()
  * ---------------------
  * Greets the person by name.
- * HINT: Look at the example closely. 
+ * HINT: Look at the example closely.
  * Capitalization, spacing, spelling, and punctuation count!
  * @param {string} name
  * @returns {string}
@@ -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()
@@ -104,7 +116,7 @@ function averageThree() {}
  * @returns {boolean}
  *
  * HINT: What JavaScript function returns the data type of something?
- * 
+ *
  * EXAMPLE:
  *  compareTypes("left", "right");
  *  //> true
@@ -112,7 +124,13 @@ function averageThree() {}
  *  compareTypes("left", 10);
  *  //> false
  */
-function compareTypes() {}
+function compareTypes(a, b) {
+  if (typeof a === typeof b) {
+    return true;
+  } else {
+    return false;
+  }
+}
 
 /**
  * flipSign()
@@ -123,7 +141,7 @@ function compareTypes() {}
  *
  * HINT: Using pencil and paper, how would you make a positive number look negative?
  * How could you apply this to a variable?
- * 
+ *
  * EXAMPLE:
  *  flipSign(-10);
  *  //> 10
@@ -131,7 +149,9 @@ function compareTypes() {}
  *  flipSign(50);
  *  //> -50
  */
-function flipSign() {}
+function flipSign(a) {
+  return a * -1;
+}
 
 /**
  * joinStringsWithSpaces()
@@ -146,12 +166,16 @@ function flipSign() {}
  *
  * HINT: You DON'T need fancy methods like `split()` and `join()` to do this.
  * What is the simplest way to combine two strings?
- * 
+ *
  * EXAMPLE:
  *  joinStringsWithSpaces("left", "right", "up", "down", "away");
  *  //> "left right up down away"
  */
-function joinStringsWithSpaces() {}
+function joinStringsWithSpaces(a, b, c, d, e) {
+  let arr = [a, b, c, d, e];
+  let x = arr.join(" ");
+  return x;
+}
 
 /**
  * getFirstAndLastCharacter()
@@ -168,7 +192,9 @@ 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..a5671c50 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 +val;
+}
 
 /**
  * convertToString()
@@ -36,7 +40,9 @@ function convertToNumber(val) {}
  *  convertToString(99);
  *  //> "99"
  */
-function convertToString(val) {}
+function convertToString(val) {
+  return val.toString();
+}
 
 /**
  * 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 +89,11 @@ function convertToWhisperText(text) {}
  *  checkIfCharacterIsInString("hello there", "a");
  *  //> false
  */
-function checkIfCharacterIsInString(text, character) {}
+function checkIfCharacterIsInString(text, character) {
+  if (text.includes(character)) {
+    return true;
+  } else return false;
+}
 
 /**
  * isEven()
@@ -95,7 +109,13 @@ 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 +131,11 @@ function isEven(num) {}
  *  isOdd(11);
  *  //> true
  */
-function isOdd(num) {}
+function isOdd(num) {
+  if (num % 2 !== 0) {
+    return true;
+  } else return false;
+}
 
 /**
  * isTruthy()
@@ -127,7 +151,13 @@ function isOdd(num) {}
  *  isTruthy(null);
  *  //> false
  */
-function isTruthy(val) {}
+function isTruthy(val) {
+  if (!!val) {
+    return true;
+  } else {
+    return false;
+  }
+}
 
 /**
  * isFalsy()
@@ -143,7 +173,13 @@ function isTruthy(val) {}
  *  isFalsy(" ");
  *  //> false
  */
-function isFalsy(val) {}
+function isFalsy(val) {
+  if (!!!val) {
+    return true;
+  } else {
+    return false;
+  }
+}
 
 // Do not change the code below.
 module.exports = {
diff --git a/src/03-control-flow.js b/src/03-control-flow.js
index 8f675935..e08978dc 100644
--- a/src/03-control-flow.js
+++ b/src/03-control-flow.js
@@ -14,7 +14,12 @@
  *  isEqual(10, "10");
  *  //> false
  */
-function isEqual(a, b) {}
+function isEqual(a, b) {
+  if (a === b) {
+    return true;
+  }
+  return false;
+}
 
 /**
  * findLarger()
@@ -28,7 +33,12 @@ function isEqual(a, b) {}
  *  findLarger(19, 7);
  *  //> 19
  */
-function findLarger(a, b) {}
+function findLarger(a, b) {
+  if (a < b) {
+    return b;
+  }
+  return a;
+}
 
 /**
  * findLargerOrTie()
@@ -45,7 +55,13 @@ function findLarger(a, b) {}
  *  findLargerOrTie(0, 0);
  *  //> "tie"
  */
-function findLargerOrTie(a, b) {}
+function findLargerOrTie(a, b) {
+  if (a === b) {
+    return "tie";
+  } else if (a < b) {
+    return b;
+  } else return a;
+}
 
 /**
  * positiveNegativeOrZero()
@@ -65,7 +81,15 @@ function findLargerOrTie(a, b) {}
  *  positiveNegativeOrZero(1);
  *  //> "Positive"
  */
-function positiveNegativeOrZero(a) {}
+function positiveNegativeOrZero(a) {
+  if (a.toString().includes("-")) {
+    return "Negative";
+  } else if (a === 0) {
+    return "Zero";
+  } else {
+    return "Positive";
+  }
+}
 
 /**
  * aroundTheWorldGreeting()
@@ -86,7 +110,15 @@ function positiveNegativeOrZero(a) {}
  *  aroundTheWorldGreeting();
  *  //> "Hello World"
  */
-function aroundTheWorldGreeting(language) {}
+function aroundTheWorldGreeting(language) {
+  if (language === undefined || language === "english") {
+    return "Hello World";
+  } else if (language === "spanish") {
+    return "Hola Mundo";
+  } else if (language === "german") {
+    return "Hallo Welt";
+  }
+}
 
 /**
  * aroundTheWorldGreetingWithSwitch()
@@ -109,7 +141,16 @@ function aroundTheWorldGreeting(language) {}
  *  aroundTheWorldGreetingWithSwitch();
  *  //> "Hello World"
  */
-function aroundTheWorldGreetingWithSwitch(language) {}
+function aroundTheWorldGreetingWithSwitch(language) {
+  switch (language) {
+    case "spanish":
+      return "Hola Mundo";
+    case "german":
+      return "Hallo Welt";
+    default:
+      return "Hello World";
+  }
+}
 
 /**
  * calculateLetterGrade()
@@ -128,7 +169,19 @@ 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 +199,13 @@ function calculateLetterGrade(grade) {}
  *  animalCounts("pig", 1);
  *  //> "1 pig"
  */
-function animalCounts(animal, numberOfAnimals) {}
+function animalCounts(animal, numberOfAnimals) {
+  let end = "";
+  if (numberOfAnimals > 1) {
+    end = "s";
+  }
+  return `${numberOfAnimals} ${animal}${end}`;
+}
 
 /**
  * evenOrOdd()
@@ -159,11 +218,16 @@ function animalCounts(animal, numberOfAnimals) {}
  * EXAMPLE:
  *  evenOrOdd(11);
  *  //> "Odd"
- * 
+ *
  *  evenOrOdd(48);
  *  //> "Even"
  */
-function evenOrOdd(a) {}
+function evenOrOdd(a) {
+  if (a % 2 === 0) {
+    return "Even";
+  }
+  return "Odd";
+}
 
 /**
  * evenOrOddWithTernary()
@@ -179,7 +243,9 @@ 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..b804016d 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 +105,10 @@ function addElementToEndOfArray(array, element) {}
  *  removeElementFromEndOfArray([ 10, 9, 8 ]);
  *  //> 8
  */
-function removeElementFromEndOfArray(array) {}
+function removeElementFromEndOfArray(array) {
+  return array.pop();
+  // return array
+}
 
 /**
  * addElementToFrontOfArray()
@@ -106,7 +122,10 @@ function removeElementFromEndOfArray(array) {}
  *  addElementToFrontOfArray([ 10 ], 9);
  *  //> [ 9, 10 ]
  */
-function addElementToFrontOfArray(array, element) {}
+function addElementToFrontOfArray(array, element) {
+  array.unshift(element);
+  return array;
+}
 
 /**
  * removeElementFromFrontOfArray()
@@ -119,7 +138,9 @@ function addElementToFrontOfArray(array, element) {}
  *  removeElementFromFrontOfArray([ 10, 9, 8 ]);
  *  //> 10
  */
-function removeElementFromFrontOfArray(array) {}
+function removeElementFromFrontOfArray(array) {
+  return array.shift();
+}
 
 /**
  * getMiddleElement()
@@ -135,7 +156,9 @@ function removeElementFromFrontOfArray(array) {}
  *  getMiddleElement([ 10, null, "30" ]);
  *  //> null
  */
-function getMiddleElement(array) {}
+function getMiddleElement(array) {
+  return array[(array.length - 1) / 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..e9e87b16 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 +39,11 @@ function createObjectWithValue(val) {}
  *  createObjectWithKey("left");
  *  //> { left: false }
  */
-function createObjectWithKey(key) {}
+function createObjectWithKey(key) {
+  return {
+    [key]: "ta-da",
+  };
+}
 
 /**
  * createObjectWithKeyValuePair()
@@ -49,7 +57,11 @@ function createObjectWithKey(key) {}
  *  createObjectWithKeyValuePair("left", "right");
  *  //> { left: "right" }
  */
-function createObjectWithKeyValuePair(key, val) {}
+function createObjectWithKeyValuePair(key, val) {
+  return {
+    [key]: val,
+  };
+}
 
 /**
  * getNameFromObject()
@@ -62,7 +74,9 @@ function createObjectWithKeyValuePair(key, val) {}
  *  getNameFromObject({ name: "Jay" });
  *  //> "Jay"
  */
-function getNameFromObject(object) {}
+function getNameFromObject(object) {
+  return object.name;
+}
 
 /**
  * getAgeFromObject()
@@ -75,7 +89,9 @@ function getNameFromObject(object) {}
  *  getAgeFromObject({ age: 30 });
  *  //> 30
  */
-function getAgeFromObject(object) {}
+function getAgeFromObject(object) {
+  return object.age;
+}
 
 /**
  * addValueToObject()
@@ -89,7 +105,10 @@ function getAgeFromObject(object) {}
  *  addValueToObject({ left: true }, false);
  *  //> { left: true, key: false }
  */
-function addValueToObject(object, val) {}
+function addValueToObject(object, val) {
+  object.rando = val;
+  return object;
+}
 
 /**
  * addKeyToObject()
@@ -103,7 +122,10 @@ function addValueToObject(object, val) {}
  *  addKeyToObject({ right: false }, "left");
  *  //> { right: false, left: true }
  */
-function addKeyToObject(object, key) {}
+function addKeyToObject(object, key) {
+  object[key] = "yee-haww!";
+  return object;
+}
 
 /**
  * addKeyValuePairToObject()
@@ -118,7 +140,10 @@ 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 +157,10 @@ 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..d3395bc6 100644
--- a/src/06-loops.js
+++ b/src/06-loops.js
@@ -11,7 +11,13 @@
  *  //> 25
  *  (3 + 4 + 5 + 6 + 7 = 25)
  */
-function rangeSum(min, max) {}
+function rangeSum(min, max) {
+  let total = 0;
+  for (let i = min; i <= max; i++) {
+    total += i;
+  }
+  return total;
+}
 
 /**
  * rangeOdd()
@@ -25,7 +31,17 @@ function rangeSum(min, max) {}
  *  rangeOdd(10, 15);
  *  //> [ 15, 13, 11 ]
  */
-function rangeOdd(min, max) {}
+function rangeOdd(min, max) {
+  let i;
+  let arr = [];
+  if (max % 2 !== 0) {
+    i = max;
+  } else i = max - 1;
+  for (i; i >= min; i -= 2) {
+    arr.push(i);
+  }
+  return arr;
+}
 
 /**
  * rangeEveryOther()
@@ -39,7 +55,13 @@ function rangeOdd(min, max) {}
  *  rangeEveryOther(11, 18);
  *  //> [ 11, 13, 15, 17 ]
  */
-function rangeEveryOther(min, max) {}
+function rangeEveryOther(min, max) {
+  let arr = [];
+  for (let i = min; i <= max; i += 2) {
+    arr.push(i);
+  }
+  return arr;
+}
 
 /**
  * containsWhileLoop()
@@ -61,8 +83,16 @@ function rangeEveryOther(min, max) {}
  *  containsWhileLoop([ "left", "up", "right" ], "down");
  *  //> false
  */
-function containsWhileLoop(array, target) {}
-
+function containsWhileLoop(array, target) {
+  let i = 0;
+  while (i < array.length) {
+    if (array[i] === target) {
+      return true;
+    }
+    i++;
+  }
+  return false;
+}
 /**
  * containsForLoop()
  * ---------------------
@@ -83,7 +113,14 @@ function containsWhileLoop(array, target) {}
  *  containsForLoop([ "left", "up", "right" ], "down");
  *  //> false
  */
-function containsForLoop(array, target) {}
+function containsForLoop(array, target) {
+  for (let i = 0; i < array.length; i++) {
+    if (array[i] === target) {
+      return true;
+    }
+  }
+  return false;
+}
 
 /**
  * targetCount()
@@ -97,7 +134,15 @@ function containsForLoop(array, target) {}
  *  targetCount([ 10, 20, 10, 20, 30 ], 10);
  *  //> 2
  */
-function targetCount(array, target) {}
+function targetCount(array, target) {
+  let c = 0;
+  for (let i = 0; i < array.length; i++) {
+    if (array[i] === target) {
+      c++;
+    }
+  }
+  return c;
+}
 
 /**
  * firstIndexFound()
@@ -117,7 +162,9 @@ function targetCount(array, target) {}
  *  firstIndexFound([ "left", "right", "left" ], "up");
  *  //> -1
  */
-function firstIndexFound(array, target) {}
+function firstIndexFound(array, target) {
+  return array.indexOf(target);
+}
 
 /**
  * lastIndexFound()
@@ -137,7 +184,14 @@ function firstIndexFound(array, target) {}
  *  lastIndexFound([ "left", "right", "left" ], "up");
  *  //> -1
  */
-function lastIndexFound(array, target) {}
+function lastIndexFound(array, target) {
+  for (let i = array.length - 1; i > 0; i--) {
+    if (array[i] === target) {
+      return i;
+    }
+  }
+  return -1;
+}
 
 /**
  * timesIndex()
@@ -151,7 +205,13 @@ function lastIndexFound(array, target) {}
  *  //> [ 7 * 0, 10 * 1, 11 * 2 ]
  *  //> [ 0, 10, 22 ]
  */
-function timesIndex(array) {}
+function timesIndex(array) {
+  const arr = [];
+  for (let i = 0; i < array.length; i++) {
+    arr.push(array[i] * i);
+  }
+  return arr;
+}
 
 /**
  * cumulativeSum()
@@ -165,7 +225,18 @@ function timesIndex(array) {}
  *  //> [ 5, 5 + 2, 5 + 2 + 9 ]
  *  //> [ 5, 7, 16 ]
  */
-function cumulativeSum(array) {}
+function cumulativeSum(array) {
+  const arr = [];
+  if (!!!array[0]) {
+    return arr;
+  } else {
+    arr.push(array[0]);
+    for (let i = 1; i < array.length; i++) {
+      arr.push(arr[i - 1] + array[i]);
+    }
+    return arr;
+  }
+}
 
 // Do not change anything below this line.
 module.exports = {
diff --git a/src/07-even-more-loops.js b/src/07-even-more-loops.js
index 250fde4a..566bd1c6 100644
--- a/src/07-even-more-loops.js
+++ b/src/07-even-more-loops.js
@@ -12,7 +12,13 @@
  *  shoutForLoop([ "A", "Very", "Happy", "Array" ]);
  *  //> [ "A!", "Very!", "Happy!", "Array!" ];
  */
-function shoutForLoop(array) {}
+function shoutForLoop(array) {
+  let arr = [];
+  for (let i = 0; i < array.length; i++) {
+    arr.push(array[i] + "!");
+  }
+  return arr;
+}
 
 /**
  * shoutWhileLoop()
@@ -28,7 +34,13 @@ function shoutForLoop(array) {}
  *  shoutWhileLoop([ "A", "Very", "Happy", "Array" ]);
  *  //> [ "A!", "Very!", "Happy!", "Array!" ];
  */
-function shoutWhileLoop(array) {}
+function shoutWhileLoop(array) {
+  let arr = [];
+  while (arr.length < array.length) {
+    arr.push(array[arr.length] + "!");
+  }
+  return arr;
+}
 
 /**
  * shoutForOfLoop()
@@ -44,7 +56,13 @@ function shoutWhileLoop(array) {}
  *  shoutForOfLoop([ "A", "Very", "Happy", "Array" ]);
  *  //> [ "A!", "Very!", "Happy!", "Array!" ];
  */
-function shoutForOfLoop(array) {}
+function shoutForOfLoop(array) {
+  const arr = [];
+  for (const e of array) {
+    arr.push(e + "!");
+  }
+  return arr;
+}
 
 /**
  * sumArray()
@@ -57,7 +75,9 @@ function shoutForOfLoop(array) {}
  *  sumArray([ 10, 0, 10, 11 ]);
  *  //> 31
  */
-function sumArray(array) {}
+function sumArray(array) {
+  return array.reduce((a, b) => a + b, 0);
+}
 
 /**
  * oddArray()
@@ -70,7 +90,15 @@ function sumArray(array) {}
  *  oddArray([ 11, 15, 20, 22, 37 ]);
  *  //> [ 11, 15, 37 ]
  */
-function oddArray(array) {}
+function oddArray(array) {
+  const arr = [];
+  for (let i = 0; i < array.length; i++) {
+    if (array[i] % 2 !== 0) {
+      arr.push(array[i]);
+    }
+  }
+  return arr;
+}
 
 /**
  * evenArray()
@@ -83,7 +111,15 @@ function oddArray(array) {}
  *  evenArray([ 11, 15, 20, 22, 37 ]);
  *  //> [ 20, 22 ]
  */
-function evenArray(array) {}
+function evenArray(array) {
+  const arr = [];
+  for (let i = 0; i < array.length; i++) {
+    if (array[i] % 2 === 0) {
+      arr.push(array[i]);
+    }
+  }
+  return arr;
+}
 
 /**
  * findSmallest()
@@ -96,7 +132,15 @@ function evenArray(array) {}
  *  findSmallest([ 0, 11, -2, 5 ]);
  *  //> -2
  */
-function findSmallest(array) {}
+function findSmallest(array) {
+  let low = array[0];
+  for (let i = 1; i < array.length; i++) {
+    if (array[i] < low) {
+      low = array[i];
+    }
+  }
+  return low;
+}
 
 /**
  * findLargest()
@@ -109,7 +153,15 @@ function findSmallest(array) {}
  *  findLargest([ 0, 11, -2, 5 ]);
  *  //> 11
  */
-function findLargest(array) {}
+function findLargest(array) {
+  let high = array[0];
+  for (let i = 1; i < array.length; i++) {
+    if (array[i] > high) {
+      high = array[i];
+    }
+  }
+  return high;
+}
 
 /**
  * findEqual()
@@ -126,7 +178,9 @@ 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 +197,15 @@ function findEqual(array, selected) {}
  *  //> [ 1, 11, 2, 3, 4, 9 ]
  */
 
-function removeDuplicates(array) {}
+function removeDuplicates(array) {
+  const arr = [];
+  for (let i = 0; i < array.length; i++) {
+    if (!arr.includes(array[i])) {
+      arr.push(array[i]);
+    }
+  }
+  return arr;
+}
 
 // Do not change any code below this line.
 module.exports = {
diff --git a/src/08-accessing.js b/src/08-accessing.js
index 079908aa..a9122fbf 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 +189,20 @@ function getFullAddress(person) {}
       numbers: [7185550921, 7185558611],
     };
  */
-function getFlatObject(person) {}
+function getFlatObject(person) {
+  let newPerson = {};
+  for (const key in person) {
+    if (!Array.isArray(person[key])) {
+      Object.keys(person[key]).forEach((item) => {
+        newPerson[item] = person[key][item];
+      });
+    } else {
+      newPerson[key] = [];
+      person[key].forEach((i) => newPerson[key].push(i));
+    }
+  }
+  return newPerson;
+}
 
 // Do not change the code below.
 module.exports = {
diff --git a/src/09-word-problems.js b/src/09-word-problems.js
index 2f63d723..1d3cd946 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) {
+  if ((hasMembership && age <= 10) || (hasMembership && age >= 65)) {
+    return priceInCents * 0.7;
+  } else if (age <= 10 || age >= 65) {
+    return priceInCents * 0.9;
+  } else if (hasMembership) {
+    return priceInCents * 0.8;
+  } else {
+    return priceInCents;
+  }
+}
 
 /**
  * getCartTotal()
@@ -40,7 +50,13 @@ function applyDiscount(priceInCents, age, hasMembership) {}
     getCartTotal(cart);
  *  //> "$30.00"
  */
-function getCartTotal(products) {}
+function getCartTotal(products) {
+  let total = 0;
+  products.forEach((item) => {
+    total = total + item.priceInCents * item.quantity;
+  });
+  return `$${Number.parseFloat(total * 0.01).toFixed(2)}`;
+}
 
 /**
  * compareLocations()
@@ -80,7 +96,26 @@ function getCartTotal(products) {}
     compareLocations(address1, address2);
     //> "Same city."
  */
-function compareLocations(address1, address2) {}
+function compareLocations(address1, address2) {
+  const check = [];
+  for (const key in address1) {
+    if (address1[key] === address2[key]) {
+      check.push(1);
+    } else {
+      check.push(0);
+    }
+  }
+  switch (check.join("")) {
+    case "1111":
+      return "Same building.";
+    case "0111":
+      return "Same city.";
+    case "0010":
+      return "Same state.";
+    default:
+      return "Addresses are not near each other.";
+  }
+}
 
 /**
  * gradeAssignments()
@@ -127,7 +162,33 @@ function compareLocations(address1, address2) {}
     //>   },
     //> ];
  */
-function gradeAssignments(assignments) {}
+// - If the assignment has a `kind` of `"PASS-FAIL"`, set the `status` value to `"PASSED"` if the `score.received` equals the `score.max`. Otherwise, set that `status` to be `"FAILED"`.
+// * - If the assignment has a `kind` of `"PERCENTAGE"`, set the `status` value to be `"PASSED: <percentage>"` if the student scored at least 80.0%. The `<percentage>` should be set to one decimal place. If the student scored less than 80.0%, set the status to `"FAILED: <percentage>"`.
+// * - If the assignment has any other `kind` than the two above, set the `status` value to equal `"SCORE: <received>/<max>"`, where `<received>` is the `score.received` value and `<max>` is the `score.max` value.
+function gradeAssignments(assignments) {
+  assignments.forEach((assignment) => {
+    if (assignment.kind === "PASS-FAIL") {
+      if (assignment.score.received === assignment.score.max) {
+        assignment.status = "PASSED";
+      } else {
+        assignment.status = "FAILED";
+      }
+    } else if (assignment.kind === "PERCENTAGE") {
+      if ((assignment.score.received / assignment.score.max) * 100 >= 80) {
+        assignment.status = `PASSED: ${Number(
+          (assignment.score.received / assignment.score.max) * 100
+        ).toFixed(1)}%`;
+      } else {
+        assignment.status = `FAILED: ${Number(
+          (assignment.score.received / assignment.score.max) * 100
+        ).toFixed(1)}%`;
+      }
+    } else {
+      assignment.status = `SCORE: ${assignment.score.received}/${assignment.score.max}`;
+    }
+  });
+  return assignments;
+}
 
 /**
  * createLineOrder()
@@ -152,7 +213,20 @@ function gradeAssignments(assignments) {}
     createLineOrder(people);
     //> [ "Ray Anderson", "America Marsh", "Wade Carson", "Patience Patel" ]
  */
-function createLineOrder(people) {}
+function createLineOrder(people) {
+  const member = [];
+  const nonMember = [];
+  console.log(people);
+  for (let i = 0; i < people.length; i++) {
+    if (people[i].hasMembership) {
+      member.push(people[i].name);
+    } else {
+      nonMember.push(people[i].name);
+    }
+  }
+  const orderedLine = member.concat(nonMember);
+  return orderedLine;
+}
 
 module.exports = {
   applyDiscount,