I think that you may have posted on the wrong board. Although we appreciate your coming to us for help, we don't just answer homework questions for students.
The way we help is to check where you are not understanding what you need to do. That usually involves students telling us what they know about the problem, how to start answering it and where they get stuck.
Maybe you don't know how to even start any of these problems?
Well, for #1, all that you need to do is apply the formula d=rt. You must know about that formula if you are being assigned these questions (unless your class is just beginning and the instructor wants to know how much you already know).
Please let us know what formulas you know and what they mean.