Don't cbet into that many people, you hardly ever take the pot down.

As played call on the turn is fine.

I think your logic for his hand range on the river is a little off, he can definitely have a 9x hand. In fact I think that line is a 9 almost always so I fold the river without reads. Calling isn't horrible though given how much they will think they can bluff you off with weak aces, and your odds are reasonable.

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