Hand Ranging Exercise : What's the River? What are they holding?

[I R BABOON]

I do enjoy this smurph, but had a long weekend away so took a few days to answer. It's a big post/exercise and it's not really one you can answer quickly in 2-3 minutes (at least I can't). I'm not really sure what the last part of this exercise is supposed to be. I assume we need to give a possible river card and give the ranges of all players again?

i) J/T[img]/images/graemlins/heart.gif[/img] board paired everybody is afraid
BTN has JJ,made quads or a FH and takes down the pot

ii) dunno [img]/images/graemlins/spade.gif[/img]

iii) Q[img]/images/graemlins/spade.gif[/img]
MP2 has KQs[img]/images/graemlins/diamond.gif[/img] . He picked up a FD on the turn and now makes a FH.

iv) dunno

Hands:
BB: AQ
MP2: KQs[img]/images/graemlins/diamond.gif[/img]
CO: I had him on Ts, AQs non-clubs, JJ, KK in the other thread but that doesn't seem to fit here
BTN: JJ

I can't seem to figure out river cards ii and iv that fit CO's range and makes him win once, but lose the other time.

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At any rate, I would love someone to do this for me on the board, I think these are more fun than sudoku.

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Was this just some made up hand here or did you simply observed a table some time and wrote their stats etc down?