Hi there
5 handed i'm raising with 77 pre-flop, make 2 or 2.50 to go here. The limp/call is ok as the table is deep in chips.
Flop, please raise. You want value here and it's very perceivable that A has hit him as well.
Turn is quite nasty but a call is ok here as played.
River shove is quite sexy though. As long as he's not tricky, this I like a lot
As for his hand, i'm along the lines of a big A, prob AQ,AK, maybe with K/Qc. Might be 55 as well though.