[plako]

Flop: Bet is sometimes ok. However in the spot you've described it seems quite bad. You have loose agresssive opponents that will make this hand hard for you unless you end up having the nuts.

Turn: You don't have even a pair and they are propably not folding. No need to bet. When you've decided to bet make it pot sized. You desperately want fold here.

River: Call. Fold is also viable option, but the price is too low to fold.