KTs when short stacked

Blinds at 1500/3000. 8 players left. Here are the relevant stacks:

Seat 1: MP1(21556 in chips)
Seat 3: MP2(10231.50 in chips)
Seat 4: CO (12852.50 in chips)
Seat 5: Button (12059 in chips)
Seat 6: SB (11900 in chips)
Seat 7: BB (23350 in chips)
Seat 8: UTG (82041 in chips)
Seat 10: UTG+1 (31510 in chips)

dealt to Button K[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/club.gif[/img]

UTG: calls 3000
4 folds
Button: ?
What's the correct play?

Assume button calls 3000

SB: raises to 11500 and is all-in
BB folds
UTG raises to 20000
Button: ?
What's the correct play?