A-5 is a fold there, its a weak ace, I agree with shellysashes when he says about not folding any pair but shoving 7-8, personally im folding 7-8 and shoving 2's and any pair above....
It is hard to figure out exact ranges for shoving from early position, I need help with this myself.
I would say with sub 10 big blinds A-8 through to AK, QJ, QK, and any pair, even 2's or 3's, 10-J suited as well possibly.
What really counts is how short the stacks are behind you.