(5$) Hero is dealt A 7 on the bubble

Here are two pf the hands I wasn't sure about last night, any help or input would be appreciated.

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (4 handed) converter

Hero (t1390)
Button (t4765)
SB (t2765)
BB (t4580)

Preflop: Hero is UTG with 7[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
Hero ??



PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (4 handed) converter

Button (t8865)
Hero (t1590)
BB (t2285)
UTG (t760)

Preflop: Hero is SB with 6[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Button raises to t400</font>, Hero?