i call, i think its really easy to put you on AK since 4.00 is only 4BB, and most people dont want to flip a coin for that much, at that limit

i dont think i push all in pre flop with A's or K's, i would reraise with those hands, but not all in
knowing you can win more it their hand hits the flop, and the drastic over bet is beggin not to be called. With A's i would made it 15 putting distance, but allowing a call

but...better to lose 4 than all if you think you have a great read

hope it helps