PLO 20 - flop 3rd nuts, missed donk, paired turn facing bet

[Earthwormjim]

PokerStars Pot-Limit Omaha, $0.25 BB (5 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

BB ($31)
UTG ($19.95)
Hero (MP) ($41.45)
Button ($25)
SB ($24.75)

Preflop: Hero is MP with :9c, :qc, :9s, :qd
UTG bets $0.85, Hero calls $0.85, Button calls $0.85, 1 fold, BB calls $0.60

Flop: ($3.50) :6c, :5c, :tc (4 players)
BB checks, UTG checks, Hero checks, Button checks

Turn: ($3.50) :6s (4 players)
BB checks, UTG bets $1.75, Hero calls $1.75, 1 fold, BB calls $1.75

River: ($8.75) :5d (3 players)
BB checks, UTG bets $3, Hero ?

in retrospec wäre flop ein klarer lead gewesen, I'm a rookie still, so don't be to hard on me!
a) angenommen ich leade flop und werde von PFraiser ge-checkraist, easy fold?
b) falls coldcall von PFraiser, was tun bei diesem turn?

ist flop coldcall ip unter diesen umständen ok? river easy fold.

villain 100/86 über 7 hände