0) No chance. Fold this on the button, its worthless. I would prefer to steal with Q2o which at least has some high card value.

1) Any 2 cards, but if i had to stab at one, i would guess a 5

2) Take the free card, but consider bluffing the river if you miss

3) Possibly: 5s, 6s, 7s?

4) I think you have to....