diff --git a/src/functions-and-arrays.js b/src/functions-and-arrays.js
index ce8695c..2113f02 100644
--- a/src/functions-and-arrays.js
+++ b/src/functions-and-arrays.js
@@ -1,34 +1,64 @@
 // Iteration 1 | Find the Maximum
-function maxOfTwoNumbers() {}
-
-
-
+function maxOfTwoNumbers(num1, num2) {
+	if (num1 == num2) return num1, num2
+	return Math.max(num1, num2)
+}
 
 // Iteration 2 | Find the Longest Word
-const words = ["mystery", "brother", "aviator", "crocodile", "pearl", "orchard", "crackpot"];
-
-function findLongestWord() {}
-
-
-
+const words = [
+	'mystery',
+	'brother',
+	'aviator',
+	'crocodile',
+	'pearl',
+	'orchard',
+	'crackpot',
+]
+
+function findLongestWord(words) {
+	if (words.length === 0) return null
+	let longestWord = ''
+	words.map((word) => {
+		if (word.length > longestWord.length) {
+			longestWord = word
+		}
+	})
+	return longestWord
+}
 
 // Iteration 3 | Sum Numbers
-const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
-
-function sumNumbers() {}
-
-
+const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10]
 
+function sumNumbers(numbers) {
+	return numbers.reduce((acc, curr) => acc + curr, 0)
+}
 
 // Iteration 4 | Numbers Average
-const numbers2 = [2, 6, 9, 10, 7, 4, 1, 9];
-
-function averageNumbers() {}
-
-
+const numbers2 = [2, 6, 9, 10, 7, 4, 1, 9]
 
+function averageNumbers(numbers2) {
+	if (numbers2.length == 0) return 0
+	return sumNumbers(numbers2) / numbers2.length
+}
 
 // Iteration 5 | Find Elements
-const words2 = ["machine", "subset", "trouble", "starting", "matter", "eating", "truth", "disobedience"];
-
-function doesWordExist() {}
+const words2 = [
+	'machine',
+	'subset',
+	'trouble',
+	'starting',
+	'matter',
+	'eating',
+	'truth',
+	'disobedience',
+]
+
+function doesWordExist(words, word) {
+	if (words.length == 0) return null
+	// for (let i = 0; i < words.length; i++) {
+	// 	if (words[i] === word) return true
+	// }
+	// words.map(w => if (w === word) return true)
+	// return false
+	return words.some((w) => w === word)
+}