diff --git a/assignments/array-methods.js b/assignments/array-methods.js
index f3862361e..f4cd429df 100644
--- a/assignments/array-methods.js
+++ b/assignments/array-methods.js
@@ -58,28 +58,57 @@ const runners = [
 // ==== Challenge 1: Use .forEach() ====
 // The event director needs both the first and last names of each runner for their running bibs. Combine both the first and last names and populate a new array called `fullNames`. This array will contain just strings.
 let fullNames = [];
+
+runners.forEach(function(currentValue){
+  let names = currentValue.first_name + ' ' + currentValue.last_name;
+  fullNames.push(names)
+});
+
 console.log(fullNames);
 
 // ==== Challenge 2: Use .map() ====
 // The event director needs to have all the runners' first names in uppercase because the director BECAME DRUNK WITH POWER. Populate an array called `firstNamesAllCaps`. This array will contain just strings.
-let firstNamesAllCaps = [];
+let firstNamesAllCaps = runners.map(function(currentValue){
+  return currentValue.first_name.toUpperCase();
+});
 console.log(firstNamesAllCaps);
 
 // ==== Challenge 3: Use .filter() ====
 // The large shirts won't be available for the event due to an ordering issue. We need a filtered version of the runners array, containing only those runners with large sized shirts so they can choose a different size. This will be an array of objects.
-let runnersLargeSizeShirt = [];
+let runnersLargeSizeShirt = runners.filter(function(currentValue){
+  return currentValue.shirt_size === 'L';
+});
 console.log(runnersLargeSizeShirt);
 
 // ==== Challenge 4: Use .reduce() ====
 // The donations need to be tallied up and reported for tax purposes. Add up all the donations and save the total into a ticketPriceTotal variable.
-let ticketPriceTotal = 0;
+let ticketPriceTotal = runners.reduce(function(accumulator, currentValue){
+  return accumulator + currentValue.donation;
+}, 0);
 console.log(ticketPriceTotal);
 
 // ==== Challenge 5: Be Creative ====
 // Now that you have used .forEach(), .map(), .filter(), and .reduce().  I want you to think of potential problems you could solve given the data set and the 5k fun run theme.  Try to create and then solve 3 unique problems using one or many of the array methods listed above.
 
-// Problem 1
+// Problem 1 Find out which which company is participating/donating to the 5k fun run.
+let companiesDon = [];
+
+runners.forEach(function(currentValue){
+  let companyName = currentValue.company_name;
+  companiesDon.push(companyName);
+});
+
+console.log(companiesDon);
+
+// Problem 2 edu
+let eduRunners = runners.filter(function(currentValue){
+  return currentValue.email === '.edu';
+});
+console.log(eduRunners);
 
-// Problem 2
+// Problem 3 The organizer had already put down a huge dontaion before donations were being accepted.
+let donationStart = runners.reduce(function(accumulator, currentValue){
+  return accumulator + currentValue.donation;
+}, 15000);
 
-// Problem 3
\ No newline at end of file
+console.log(donationStart);
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
index cb72e70c9..b54b9cd40 100644
--- a/assignments/callbacks.js
+++ b/assignments/callbacks.js
@@ -38,27 +38,48 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
   console.log(test2); // "this Pencil is worth a million dollars!"
 */
 
-
+// getLength passes the length of the array into the callback.
 function getLength(arr, cb) {
-  // getLength passes the length of the array into the callback.
+  return cb(items.length);
 }
 
+getLength (items, lengthOfItems => {
+  console.log(lengthOfItems);
+});
+
+// last passes the last item of the array into the callback.
 function last(arr, cb) {
-  // last passes the last item of the array into the callback.
+  return cb(items.slice(-1));
 }
 
+last (items, lastItem => {
+  console.log(lastItem);
+});
+
+// sumNums adds two numbers (x, y) and passes the result to the callback.
 function sumNums(x, y, cb) {
-  // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x, y);
+}
+function add (x, y){
+  return x + y;
 }
+console.log(sumNums(5,10,add));
 
+// multiplyNums multiplies two numbers and passes the result to the callback.
 function multiplyNums(x, y, cb) {
-  // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x, y);
 }
+function multiply (x, y){
+  return x * y;
+}
+console.log(multiplyNums(4,8,multiply));
 
-function contains(item, list, cb) {
-  // contains checks if an item is present inside of the given array/list.
+// contains checks if an item is present inside of the given array/list.
   // Pass true to the callback if it is, otherwise pass false.
+function contains(item, list, cb) {
+  return cb(list.includes(item));
 }
+contains ('Pencil', items, console.log);
 
 /* STRETCH PROBLEM */
 
diff --git a/assignments/closure.js b/assignments/closure.js
index 4b399c098..e9c4f5d33 100644
--- a/assignments/closure.js
+++ b/assignments/closure.js
@@ -4,6 +4,17 @@
 // that manipulates variables defined in the outer scope.
 // The outer scope can be a parent function, or the top level of the script.
 
+function makeThemMultiply(num1) {
+  return function(num2) {
+    return num1 * num2;
+  };
+}
+
+let firstNumber = makeThemMultiply(4);
+let secondNumber = makeThemMultiply(2);
+
+console.log(firstNumber(10));
+console.log(secondNumber(15));
 
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */
 
diff --git a/assignments/index.html b/assignments/index.html
index 69e95d591..9486dacf4 100644
--- a/assignments/index.html
+++ b/assignments/index.html
@@ -11,7 +11,7 @@
   <script src="callbacks.js"></script>
   <script src="closure.js"></script>
 </head>
-
+<!-- //comment -->
 <body>
 <h1>JS II - Check your work in the console!</h1>
 </body>