diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index ce8695c..9da1c0b 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,5 +1,12 @@
 // Iteration 1 | Find the Maximum
-function maxOfTwoNumbers() {}
+function maxOfTwoNumbers(num1, num2) {
+    if (num1 > num2) {
+        return num1;
+    } else {
+        return num2;
+    }
+}
+
 
 
 
@@ -7,7 +14,18 @@ function maxOfTwoNumbers() {}
 // Iteration 2 | Find the Longest Word
 const words = ["mystery", "brother", "aviator", "crocodile", "pearl", "orchard", "crackpot"];
 
-function findLongestWord() {}
+function findLongestWord(words) {
+    if ( words.length === 0) return null;
+
+    let longest = words [0]
+    for (let i = 0; i < words.length; i++) {
+        if (words[i].length > longest.length) {
+            longest = words[i];
+        }
+
+    }
+return longest;
+}
 
 
 
@@ -15,7 +33,13 @@ function findLongestWord() {}
 // Iteration 3 | Sum Numbers
 const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
 
-function sumNumbers() {}
+function sumNumbers(numbers) {
+  let sum = 0;
+  for (let i = 0; i < numbers.length; i++) {
+    sum += numbers[i];
+  }
+  return sum;
+}
 
 
 
@@ -23,7 +47,13 @@ function sumNumbers() {}
 // Iteration 4 | Numbers Average
 const numbers2 = [2, 6, 9, 10, 7, 4, 1, 9];
 
-function averageNumbers() {}
+function averageNumbers(numbers) {
+  if (numbers.length === 0) return 0;
+
+  let sum = sumNumbers(numbers);
+  return sum / numbers.length;
+}
+
 
 
 
@@ -31,4 +61,7 @@ function averageNumbers() {}
 // Iteration 5 | Find Elements
 const words2 = ["machine", "subset", "trouble", "starting", "matter", "eating", "truth", "disobedience"];
 
-function doesWordExist() {}
+function doesWordExist(wordsArray, wordToFind) {
+  if (wordsArray.length === 0) return null;
+  return wordsArray.includes(wordToFind);
+}
\ No newline at end of file