diff --git a/12_findTheOldest/findTheOldest.js b/12_findTheOldest/findTheOldest.js
index 366856a..8cf8e31 100644
--- a/12_findTheOldest/findTheOldest.js
+++ b/12_findTheOldest/findTheOldest.js
@@ -1,5 +1,10 @@
-const findTheOldest = function() {
-
+const findTheOldest = function(array) {
+    const oldest = array.sort((a, b) => {
+        let ageA = a.yearOfDeath - a.yearOfBirth;
+        let ageB = b.yearOfDeath - b.yearOfBirth;
+        return (ageA > ageB) ? -1 : 1;
+    })[0];
+    return oldest;
 };
 
 // Do not edit below this line