A hand played by somebody else

[bicyclekick]

Full table - Folded to hero who open raises in the CO with AK, bicyclekick 3 bets on the button, unkown (so likely not great) caps in the sb, bb folds, hero calls, bk calls.

Flop
8[img]/images/graemlins/diamond.gif[/img]7[img]/images/graemlins/heart.gif[/img]8[img]/images/graemlins/heart.gif[/img]
sb bets, hero calls, bk calls.

turn 7[img]/images/graemlins/club.gif[/img]
sb bets, hero calls, bk folds.

Who's calling the turn? Who's folding?

River 2[img]/images/graemlins/club.gif[/img]
sb bets, hero ?

Again, same question. call/fold?