I was wondering I f someone could help me answer the previous questions using step by step methods so that I can figure out how to answer a,b, & c?

Sure, which questions?

I think the OP is referring to this:
https://www.askmehelpdesk.com/physics/space-probe-surface-mars-sends-radio-signal-back-444308.html#post2221338

AtruDiva - if you want to ask a follow-up question to your original post it's best to use the "Answer this question" box. Starting a new thread like you've done here is confusing to everybody. Anyway - I've given you some good hints as to how to solve the problems in your original thread.