Trying out isolating MP and LP limpers from BTN. Both villians are stations. Who cbets, why? Who double barrels what?

Preflop: Hero is Button with 2, K.
3 folds, MP2 calls $2, 2 folds, Hero raises to $9, SB calls $8, 1 fold, MP2 calls $7.

Flop: ($29) 6, 4, T (3 players)
SB checks, MP2 checks