preflop and river

[chabibi]

5-10 live loose passive

Hero is BB with 7 [img]/images/graemlins/spade.gif[/img]8 [img]/images/graemlins/club.gif[/img]
UTG calls UTG+1 calls UTG+2 calls MP1 raises MP2 calls MP3 calls CO calls Button calls SB calls Hero calls UTG calls UTG+1 calls UTG+2 calls

Flop (20 sb)
5 [img]/images/graemlins/spade.gif[/img] J [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/spade.gif[/img]
SB checks Hero Checks UTG checks UTG+1 checks UTG+2 bets MP1 calls MP2 calls MP3 calls CO calls Button calls SB calls Hero raises UTG calls UTG+1 calls

turn(20 BB)
6 [img]/images/graemlins/heart.gif[/img]
SB checks Hero checks UTG checks UTG+1 checks UTG+2 checks MP1 checks MP2 checks MP3 checks CO checks Button checks

River 4 [img]/images/graemlins/club.gif[/img]
SB checks Hero bets UTG raises UTG+1 folds UTG+2 3-bets MP1 folds MP2 folds MP3 folds CO folds Button folds SB folds Hero caps UTG folds UTG+1 calls
final pot: 30 BB

would you
a) call preflop?
b) cap the river?