A: You'll probably get a headache. And possibly a few gray hairs. And possibly a time paradox. But hey, it's worth it for the thrill of it all!
A: You'll need to find a lawyer who specializes in ancient Egyptian law. Good luck with that. You might also need to learn how to write in hieroglyphics and find a way to get to the correct time-space coordinate. Oh, and don't forget to pack your sunscreen.
A: Good luck with that. They were still drinking beer. You might have a case, but it's going to be a tough sell. You might need to get a lawyer who specializes in ancient Egyptian torts, and then you'll have to navigate the complexities of ancient Egyptian tort law... it's not like they have a Starbucks nearby, you know?
Disclaimer: Temporal Lawsuits are not actually a real thing.