My house is 5 years old I have a problem the top of one of my electrical outlets don't work the bottom one does it eas the one the garbage desposal was plugged into if I have to replace the whole outlet is it possible to do it myself or have a professional do it.

Block,
Is it possible that the disposal was plugged into this and operated by
A switch located nearby? Does the part of the receptacle that is not working
Turn on with this nearby switch?
If not, how does the disposal operate?