Badugi questions

[ActionFreak]

Loose player opens in middle position. I am in late position with something like A2xx.

Scenario 1. It folds around to me. What 3rd cards should I keep? For example.. should I fold 8 or higher? Is it an easy call with just A2? If so, what two card hands should I play here? Am I raising all three card hands (that i plan to play) and smooth calling two card hands?

Scenario 2. Average player smooth calls. What kind of hands should I call with? What kind of hands should I raise with?

Scenario 3. Tight aggressive player raises. Should I fold all three card hands here to 3 bets? Seems like an easy fold because I am never far ahead and often behind.