Overplayed unimproved AK

[friends]

Party 1/2, MP2 and button - loose and passive, SB - rock.

Preflop: Hero is UTG with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises</font>, <font color="#666666">1 folds</font>, MP1 calls, MP2 calls, <font color="#666666">2 folds</font>, Button calls, SB calls, BB calls.

Flop: (12.00 SB) 3[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets</font>, MP1 folds, MP2 calls, Button calls, SB calls, BB folds.

Turn: (8.00 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP2 calls, Button calls, SB folds.

River: (11.00 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP2 raises</font>, Button folds, Hero calls.

Final Pot: 15.00 BB.

1)Should I bet the flop to buy outs having 1:12 (it is not easy to eleminate opponents on such harmless flop, but..)?
2)Should I check/fold the turn having only 1:8 and maximum 4 outs?
3)The river is really overplayed, but should I call if there was a bet having 1:12/13 against 1/2 opponents?