Would you get away from AKs here?

Both of these hands occurred halfway through the money field. My stack was slightly below average for each. I'm playing for first.

Unfortunately, I have 9 hands for CO and 23 for MP3. No reads for them.

PokerStars No-Limit Hold'em Tourney, Big Blind is t800 (9 handed) converter

MP2 (t30282)
MP3 (t21770)
CO (t28040)
Hero (t11222)
SB (t10828)
BB (t10675)
UTG (t8128)
UTG+1 (t24074)
MP1 (t1278)

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">MP3 raises to t1600</font>, <font color="#CC3333">CO raises to t4000</font>, Hero...?

How about here?

CO is 23/8/.22, SB is same as CO from first hand, no read.

PokerStars No-Limit Hold'em Tourney, Big Blind is t800 (8 handed) converter

CO (t29232)
Button (t20148)
SB (t32640)
Hero (t10972)
UTG (t10178)
UTG+1 (t10825)
MP1 (t47540)
MP2 (t32302)

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">CO raises to t1600</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">SB raises to t5600</font>, <font color="#CC3333">Hero...?</font>

Do you fold these, call these or push these?