Two Hands from a Live MTT

[tarantulabob]

Turning Stone Tuesday Night 40+10 Bounty Tournament
I'm a noob and haven't played very many of these live tourneys. Any help is appreciated:

Hand 1

10 Handed - Blinds 25/50
All fold to Hero in MP+2? (I'm 3 off the button)
Hero has AcJs and bets 150
2 folds
Button raises to 300
SB Calls
Hero Calls
Pot is 950
(Reads: Button is loose, playing any ace rag, SB has shown some solid hands)

Flop AsKcQs (I think, it was all black anyway)

SB bets 500

Hero? (I think I had about 1800 - 2000 in chips)

Hand 2:

8 handed - Blinds are 400/800
UTG Limps
Folds to CO who moves all in for 4500 (or so, has me covered)
Button folds
Hero is SB with AKo and 3900 left. Is this a must call?
Reads: UTG limps and folds alot. BB has all the signs of folding. CO has played few hands and is getting short. I figure him for a pocket pair or a suited high ace. 24 people left, pays out 12 places.

Do I have to call?

[Bullet_Dodger]

Hand 1: Easy fold.
Hand 2: Easy call.

[tarantulabob]

Thanks. That's pretty much what I figured, but I was disappointed to see the red 10 on the turn in hand 1 and have the other guys 10s hold up in hand 2.
TB