AK. Where do I stand?

[Misja]

Hijack is 28/14/2
CO is 11/7/1.1

I am unsure about my preflop and turn calls. Also I wonder what I should have done if CO would have betted the river as well?

Absolute poker $5/$10, full ring.

I am Button and hold A [img]/images/graemlins/club.gif[/img] K [img]/images/graemlins/heart.gif[/img]

Folded to hijack who raises, CO reraises, I call. Rest of the table folds, hijack calls.
Flop: 4 [img]/images/graemlins/club.gif[/img]4 [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/club.gif[/img]
hijack checks, CO checks, I bet, hijack folds, CO calls.
Turn: 5 [img]/images/graemlins/heart.gif[/img]
CO now bets, I just call
River: 9 [img]/images/graemlins/club.gif[/img]
CO checks, I check