In order to to use an Image as a Link, you must wrap the Image Tags with Hyperlink Tags which look like this:
<a href="http://www.linkaddress.com"> and of course </a> is the closing Tag defining how much content to make clickable.
Place the Image Tags in between the Hyperlink Tags like this:
To see a list of the Image Tag Attributes, Click Here.
If you don't know where to go to get the Image Address or URL, Click Here to see a demonstration.