[rubixxcube]

I don't put him as full on 5th. That would mean he had rolled queens or Q7 underneath. If he's raising with rolled queens on 3rd then he's 4 betting it as well more than likely. He may have Q7 underneath but i don' think it's often enough to weigh heavily in his range.

Lower levels people raise more on draws to try to get free cards, i think at 30/60 you get 3 bet more often so people will tend to do it less.

I think his 2 most likely hands are two pair of Queens and 7's or lower, he may have pocket 10's or something or a flush.

If this player usually raises only with pairs to start then i raise the river, if he raises with 3 cards to a flush a lot then i simply call.