diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
index 0dcfd00f40..1b65701396 100644
--- a/04 - Array Cardio Day 1/index-START.html	
+++ b/04 - Array Cardio Day 1/index-START.html	
@@ -35,13 +35,33 @@
       'Berne, Eric', 'Berra, Yogi', 'Berry, Wendell', 'Bevan, Aneurin', 'Ben-Gurion, David', 'Bevel, Ken', 'Biden, Joseph', 'Bennington, Chester', 'Bierce, Ambrose',
       'Billings, Josh', 'Birrell, Augustine', 'Blair, Tony', 'Beecher, Henry', 'Biondo, Frank'
     ];
+
+   
     
     // Array.prototype.filter()
     // 1. Filter the list of inventors for those who were born in the 1500's
 
+
+    function filterBday(array, yearTest) {
+      return array.filter(inventor => inventor.year < yearTest + 100 && inventor.year >= yearTest);
+    }
+
+    let inventorsFrom1500 = filterBday(inventors, 1500);
+    // console.log(inventorsFrom1500);
+
+    let inventorsFrom1800 = filterBday(inventors, 1800);
+    // console.log(inventorsFrom1800);
+
     // Array.prototype.map()
     // 2. Give us an array of the inventors first and last names
 
+    function firstLast (array) {
+      return array.map(inventor => `${inventor.first} ${inventor.last}`);
+    }
+
+    let inventorsNames = firstLast(inventors);
+    console.log(inventorsNames);
+
     // Array.prototype.sort()
     // 3. Sort the inventors by birthdate, oldest to youngest