Energy and Society Physics question! Help!?

A man decides to climb an office tower using the stairs. If the floors are 3.8 m apart, how much gravitiational potential energy would the man have relative to the ground floor if he made it to the a) fifth floor? b) tenth floor? c) the first basement level? I have tried everything, and I've gotten nowhere.... show more A man decides to climb an office tower using the stairs. If the floors are 3.8 m apart, how much gravitiational potential energy would the man have relative to the ground floor if he made it to the a) fifth floor? b) tenth floor? c) the first basement level?

I have tried everything, and I've gotten nowhere. It doesn't seem like a hard question, and I'll probably smack myself for stupidity after I get some help. :) Thanks in advance!
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