diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index 3a7dbec..93ec3ce 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,20 +1,47 @@
 // Iteration #1: Find the maximum
-function maxOfTwoNumbers() {}
+function maxOfTwoNumbers(x,y) {
+  if (x > y) {
+    return x;
+  }
+  if (y > x){
+        return y;
+  }
+  else{
+        console.log("Both are equal");
+        return x;
+  }
+}
 
 
 
 // Iteration #2: Find longest word
 const words = ['mystery', 'brother', 'aviator', 'crocodile', 'pearl', 'orchard', 'crackpot'];
 
-function findLongestWord() {}
-
+function findLongestWord(x) {
+  let max = x[0];
+  if (x.length === 0) return null;
+  for (let i = 1; i < x.length; i++){
+      if (x[i].length > max.length){
+        max = x[i];
+      }
+    }
+    return max;
+}
 
+console.log(findLongestWord(words));
 
 // Iteration #3: Calculate the sum
 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 = sum + numbers[i];
+  }
+  return sum;
+}
 
+console.log(sumNumbers(numbers));
 
 
 // Iteration #3.1 Bonus:
@@ -26,13 +53,27 @@ function sum() {}
 // Level 1: Array of numbers
 const numbersAvg = [2, 6, 9, 10, 7, 4, 1, 9];
 
-function averageNumbers() {}
+function averageNumbers(numbers) {
+  if (numbers.length === 0) {
+    return null;}
+  let average = 0;
+  let sum = sumNumbers(numbers);
+  average = sum/numbers.length;
+  return average;
+}
 
 
 // Level 2: Array of strings
 const wordsArr = ['seat', 'correspond', 'linen', 'motif', 'hole', 'smell', 'smart', 'chaos', 'fuel', 'palace'];
 
-function averageWordLength() { }
+function averageWordLength(arr) { 
+  if (arr.length === 0) return null;
+  let sum = 0;
+  for (let i =0; i< arr.length; i++){
+    sum = sum + arr[i].length;
+  }
+  return sum/ arr.length;
+}
 
 // Bonus - Iteration #4.1
 function avg() {}
@@ -52,15 +93,32 @@ const wordsUnique = [
   'bring'
 ];
 
-function uniquifyArray() {}
+function uniquifyArray(words) {
+  if (words.length === 0) return null;
+  let newArray = [];
+  for (let i = 0; i < words.length; i++) {
+    if (words.indexOf(words[i]) === i) {
+      newArray.push(words[i]);
+    }
+  }
+  return newArray;
+}
 
 
 
 // Iteration #6: Find elements
 const wordsFind = ['machine', 'subset', 'trouble', 'starting', 'matter', 'eating', 'truth', 'disobedience'];
 
-function doesWordExist() {}
-
+function doesWordExist(words, word) {
+  if (words.length === 0) 
+    {return null}
+  for (let i =0; i< words.length; i++){
+    if (words[i] === word){
+      return true;
+    }
+  }
+  return false;
+}
 
 
 // Iteration #7: Count repetition
@@ -78,7 +136,16 @@ const wordsCount = [
   'matter'
 ];
 
-function howManyTimes() {}
+function howManyTimes(words, word) {
+  if (words.length === 0) return 0;
+  let count = 0;
+  for (let i = 0; i< words.length; i++){
+    if (words[i] === word){
+      count = count + 1;
+    }
+  }
+  return count;
+}