AKo hand, TPTK on Flop

[Inevitable]

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) converter

BB ($3.60)
UTG ($3.35)
UTG+1 ($25.05)
MP1 ($11.40)
Hero ($23.25)
MP3 ($1.35)
CO ($5.30)
Button ($4.15)
SB ($2.65)

Preflop: Hero is MP2 with K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
UTG calls $0.10, <font color="#CC3333">UTG+1 raises to $0.3</font>, <font color="#666666">1 fold</font>, Hero calls $0.30, <font color="#666666">2 folds</font>, Button calls $0.30, <font color="#666666">1 fold</font>, BB calls $0.20, UTG calls $0.20.

Flop: ($1.55) K[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
BB checks, <font color="#CC3333">UTG bets $0.4</font>, <font color="#CC3333">UTG+1 raises to $1.9</font>, Hero folds, Button folds, BB calls $1.90, UTG folds.

Turn: ($5.75) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">UTG+1 bets $2.6</font>, BB calls $1.40 (All-In).

River: ($9.75) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $9.75

UTG is 25/7/2.5 after 55.
UTG+1 is 41/3/2 after 81.

I was wondering, should I have re-raised preflop?

Do I push the flop, fold, or cold-call?