I need to know the code for an image to be placed in a tab

Hi, I am trying insert a floor plan image into a tab, I googled CSS but wasn't very successful as you will see. Can you please help me again with the code for an image here is the link. Also the font is really big come code to fix that would be greatly appreciated.

http://www.littleriverbnb.com.au/?accommodation=hotel-room-4

Also do you know of any good plugins for social buttons? I have ticked the box to display them however the theme doesn't seem to work, I tried contacting their support but they haven't got back to me so I thought I would try a plugin as an alternative.

cheers Kinnear