Interesting hand odds situation

[CurryLover]

This is a hand a friend played in a SNG recently. Try to estimate the percentage chance each hand has of winning if they all see the river. Do it without using a poker calculator first and see if you get approximately the right answer:

Hand 1: ThTd
Hand 2: 7d7s
Hand 3: AcJh
Hand 4: KsQs

My friend had the AJo and folded it pre-flop, but ignore that and pretend all 4 hands see the river. Who is favourite?

I found the results a little surprising. Comments?