I think the newest, because the server is a new one.
If you're uncertain of the specs you currently have, it is imperative that you apply the following command in a file called : info.php :
<?php
phpinfo();
?>
Save it. Then, upload it to your root path of 4images and apply the file from your browser. From there, you should be able to see your PHP version and mySQL version. In fact, I have built a MOD about this - available in ACP some time ago as I forgot to post it. I will do so immediately. For now, apply these steps and keep this thread updated.