Some marginal situations.

[Romulet]

I'm wanting to make sure that I'm not leaking cash in what I consider to be marginal situations. Any chance of thoughts on these?

1 You're in BB with 72s co raises and sb completes. Fold or play?

2 You're in BB with 72s co raises button calls sb calls. Fold or play?

3 You're in bb with 86o co raises button calls and sb calls. Fold or play?

4 You're sb with j6o button limps, fold or play?

5 You have 52o in the bb, 3 limpers you check. Flop k85 rainbow, everybody checks to the button who bets. Raise, fold, call?