diff --git a/05_Day_Arrays/05_day_starter/scripts/main.js b/05_Day_Arrays/05_day_starter/scripts/main.js
index 50cc07e..a82dd7e 100644
--- a/05_Day_Arrays/05_day_starter/scripts/main.js
+++ b/05_Day_Arrays/05_day_starter/scripts/main.js
@@ -1,3 +1,101 @@
-console.log(countries)
-alert('Open the browser console whenever you work on JavaScript')
-alert('Open the console and check if the countries has been loaded')
\ No newline at end of file
+//console.log(countries)
+//alert('Open the browser console whenever you work on JavaScript')
+//alert('Open the console and check if the countries has been loaded')
+
+                    // Exercise Level 1 for Day 5
+
+// Exercise 1                    
+const emptyArray = Array();
+console.log(emptyArray);
+
+// Exercise 2
+const fiveElements = [1,2,3,4,5];
+
+// Exercise 3
+console.log(fiveElements.length)
+
+// Exercise 4
+const firstItem = fiveElements[0];
+const lastItem = fiveElements[4];
+const middleItem = fiveElements[2];
+
+console.log(firstItem)
+console.log(lastItem)
+console.log(middleItem)
+
+// Exercise 5
+const mixedDataTypes = ['Gideon', [1,2,3,4,5] , 2002, true, null, undefined]
+
+console.log(mixedDataTypes.length)
+
+// Exercise 6
+const itCompanies = ['facebook', 'google', 'microsoft', 'apple', 'IBM', 'oracle', 'amazon'];
+
+// Exercise 7
+console.log(itCompanies);
+
+// Exercise 8
+console.log(itCompanies.length)
+
+// Exercise 9
+const firstCompany = itCompanies[0];
+const lastCompany = itCompanies[itCompanies.length - 1]; 
+const middleIndex = Math.floor(itCompanies.length / 2);
+const middleCompany = itCompanies[middleIndex];
+
+console.log(firstCompany);
+console.log(lastCompany);
+console.log(middleCompany);
+
+
+// Exercise 10
+for (const company of itCompanies) {
+    console.log(company);   
+  }
+
+// Exercise 11
+console.log(itCompanies[0].toUpperCase());
+console.log(itCompanies[1].toUpperCase());
+console.log(itCompanies[2].toUpperCase());
+console.log(itCompanies[3].toUpperCase());
+console.log(itCompanies[4].toUpperCase());
+console.log(itCompanies[5].toUpperCase());
+console.log(itCompanies[6].toUpperCase());
+
+
+// Exercise 12
+const sentence = itCompanies.join(',') + 'are big IT companies.'
+console.log(sentence)
+
+// Exercise 13
+const checkCompany = prompt('Input IT company: ').toLowerCase();
+
+if (itCompanies.includes(checkCompany)) {
+    console.log(`${checkCompany} is an IT company`);
+} else {
+    console.log(`Sorry ${checkCompany} is not found.`);
+}
+
+// Exercise 14
+
+// Exercise 15
+console.log(itCompanies.sort())
+
+// Exercise 16
+console.log(itCompanies.reverse())
+
+// Exercise 17
+const firstThreeCompanies = itCompanies.slice(0, 3)
+console.log(firstThreeCompanies)
+
+// Exercise 18
+const lastThreeCompanies = itCompanies.slice(-3)
+console.log(lastThreeCompanies)
+
+// Exercise 19
+
+
+// Exercise 20
+// Exercise 21
+// Exercise 22
+// Exercise 23