50 NL: River Fold? Turn Fold?

[BYRNE11]

Two hands i had last session that i would like to here some input on.

1.No reads on either player.

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($54.05)
MP1 ($48.15)
MP2 ($10.90)
CO ($42)
Button ($17.55)
SB ($42.50)
BB ($48.10)
UTG ($46.75)

Preflop: Hero is UTG+1 with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2</font>, MP1 calls $2, <font color="#666666">1 fold</font>, CO calls $2, <font color="#666666">3 folds</font>.

Flop: ($6.75) 2[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $3.5</font>, MP1 calls $3.50, CO calls $3.50.

Turn: ($17.25) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP1 checks, CO checks.

River: ($17.25) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $10</font>, MP1 calls $10, <font color="#CC3333">CO raises to $36.5</font>,Hero????


2.Villian is 20.5/6.5/.82


PokerStars No-Limit Hold'em, $0.50 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($61.70)
UTG ($17)
MP1 ($51.05)
MP2 ($49.85)
Hero ($49.25)
Button ($52.55)
SB ($9.50)

Preflop: Hero is CO with 8[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, MP2 calls $0.50, <font color="#CC3333">Hero raises to $2</font>, <font color="#666666">3 folds</font>, MP2 calls $1.50.

Flop: ($4.75) T[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, <font color="#CC3333">Hero bets $3</font>, MP2 calls $3.

Turn: ($10.75) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets $9.5</font>, Hero...?

[Chargers In 07]

In the first hand make your flop bet $5. I like the rest if you fold the river.
In the second, bet $4 on the flop, call turn and reaval river.