Suppose 60bb stacks and a 7-handed table.

A tight/aggressive player opens for 4xbb from UTG/4-off-the-button. The CO calls, we call on the button with 5 5, and the blinds fold.

The pot is 13.5bb and the flop comes K T 5 .

1. UTG bets 10bb and CO folds. What is our play?
2. UTG bets 10bb and CO calls. What is our play?
3. UTG checks and CO bets 10bb. What is our play?