very basic question about how to change image order

hi there, my web designer has gone AWOL and I want to know how to do basic changes to my website so I hope someone can help.

On my homepage there are images under ‘latest products’ but I want to change which images it shows? how can I change this?

I am not sure if my previous designer used a slider or a theme? how can I check this?

when I goto my dashboard I can see that:

cuteslider WP
revolution slider

are installed, but I don’t know if any of them are the ones that are responsible for the images on the home page? please help!