To spice this up a little(or maybe not)

UTG's range is

44+
A5s+
KJs+
QJs+

Reasons: Have only played 2 hands in the whole tournament so far. #1. AJ push gets called by A6. #2. AQ push gets called by A7.

UTG is an idiot and will limp/call anything so you NEED to open steal as much as possible because stealing when in the Small blind will never be an option.
SB knows who you are and knows when to call and when not to.
Button is pretty tight and will only call with top hands.