1998 Chevy Lumina I have a question about struts/shocks

I have a noise coming from the rear of my car when I go over bumps - it's a squeaking noise that is worse when the bumps are bigger. (Sounds like a squeaky spring when it coils and recoils when compressed and let go.) I have been told that it could be the struts, the bearings, bushings, inserts, etc.

There is also a new rattling noise that happens when I go over bumps as well. It's not very loud, but it's there and I can't pinpoint exactly where it's coming from.

What do you think?