diff --git a/assignments/array-methods.js b/assignments/array-methods.js
index f3862361e..78a8c1b7a 100644
--- a/assignments/array-methods.js
+++ b/assignments/array-methods.js
@@ -59,20 +59,34 @@ const runners = [
 // 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 = [];
 console.log(fullNames);
+runners.forEach(function(items){ return fullNames.push(`${items.first_name} ${items.last_name}`)});
+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 = [];
 console.log(firstNamesAllCaps);
+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 = [];
+
+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;
+ticketPriceTotal = runners.reduce(function(accumulator, currentValue){
+  return accumulator + currentValue.donation;
+},0)
 console.log(ticketPriceTotal);
 
 // ==== Challenge 5: Be Creative ====
diff --git a/assignments/callbacks.js b/assignments/callbacks.js
index cb72e70c9..84c37f14d 100644
--- a/assignments/callbacks.js
+++ b/assignments/callbacks.js
@@ -33,7 +33,7 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
   function logExorbitantPrice(article) {
     return `this ${article} is worth a million dollars!`;
   };
-
+ 
   const test2 = firstItem(items, logExorbitantPrice);
   console.log(test2); // "this Pencil is worth a million dollars!"
 */
@@ -41,23 +41,39 @@ const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
 
 function getLength(arr, cb) {
   // getLength passes the length of the array into the callback.
+  // let cb = arr.length 
+  return cb(arr.length);
 }
+ function test1(items, getLength) {
+   console.log(test1)
+ }
+
+ getLength(items, length => `the length of this array is ${length}`);
 
 function last(arr, cb) {
   // last passes the last item of the array into the callback.
+  return cb(arr.length-1)
 }
 
 function sumNums(x, y, cb) {
   // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x + y) 
 }
 
 function multiplyNums(x, y, cb) {
   // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y) 
 }
 
 function contains(item, list, cb) {
   // contains checks if an item is present inside of the given array/list.
   // Pass true to the callback if it is, otherwise pass false.
+  for (i = 0; i < list.length; i++) {
+    if (list[i] === item ) {
+      return cb(true)
+    } else { 
+      return cb(false)}
+  }
 }
 
 /* STRETCH PROBLEM */
diff --git a/assignments/closure.js b/assignments/closure.js
index 4b399c098..198257ed5 100644
--- a/assignments/closure.js
+++ b/assignments/closure.js
@@ -3,8 +3,14 @@
 // Keep it simple! Remember a closure is just a function
 // that manipulates variables defined in the outer scope.
 // The outer scope can be a parent function, or the top level of the script.
-
-
+ function init(){
+let name = "Yannick";
+ function displayName(){
+   console.log(name)
+ }
+ displayName();
+ }
+ init();
 /* STRETCH PROBLEMS, Do not attempt until you have completed all previous tasks for today's project files */