A Few AXs Situations; What's Your Move?

[Vote4Pedro]

Just a quick checkup, I wanna make sure I'm playing these correctly...

No stats, but Button seems like a wannabe TAG and MP is a complete moran(Laggish), SB is new, so lets assume hes a monkey

Party Poker 0.50/1 Hold'em (6 max, 6 handed) converter

Preflop: Hero is BB with 4[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img]. MP posts a blind of $0.50. CO posts a blind of $0.50.
UTG calls, MP (poster) checks, CO (poster) checks, <font color="#CC3333">Button raises</font>, SB calls, Hero calls, UTG folds, <font color="#CC3333">MP 3-bets</font>, CO folds, Button calls, SB calls, Hero calls.

Flop: (14 SB) A[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>

1) SB checks, Hero checks, MP bets, Button calls, SB folds, Hero...
2) SB checks, Hero checks, MP checks, Button bets, SB folds, Hero...
3) SB checks, Hero checks, MP bets, Button raises, SB folds, Hero...
4) SB checks, Hero checks, MP bets, Button folds, SB folds, Hero...
5) SB bets, Hero...

What and Why?