return an array of object's names sorted by the object's age from youngest to oldest : <p>im given an array of objects. The objects contain the properties name  and age . i have to return an array of object's names sorted by the object's age from youngest to oldest.</p>

<pre><code>sortArray([{name:'bob', age:96}, {name:'tom', age:24}, {name:'tim', age:65}]) 
</code></pre>

<p>should just return ['tom', 'tim', 'bob']</p>
