1 - You only beat a bluff - the flush card could very well have helped you yet he raises anyway, have to fold here.

2 - The only thing you beat is a bluff - betting the river may get value out of 88-1010 or QQ so C/C may be a better line. tough spot but I'd just fold.

3 - This looks so much like J9 - especially against somebody that passive. Fold.

4 - If this is the first time he has 4-bet preflop I'd fold then.