Interact with object values in JavaScript : <pre><code>a = [{name: James, Location: London},
{name: Martin, Location: Seattle},...
{name: George, Location: New York}];
</code></pre>

<p>How can I find the count of number of items present?
How can I replace George with Suarez?
How can I display only <em>"Martin from Seattle"</em> on the screen?
How can I add a new object in between first and second?</p>
