JJ in co with 45bb, $10 10k guarentee 50 left

[tedjam]

read is he is straight forward but not very good player (-10%roi)
but

not a nit

but unlikely to 4 bet bluff,

do I flat his three bet if so why? advice on playing flop?

or

4 bet get it in and why and what size to 4 bet ?

table pretty soft and i can steal comfortably, should i preserve my stack and play low vairance
with my healthy stack or take this probable small edge here by 4 bet and calling all in if he 5 bets

Poker Stars, $10 + $1 NL Hold'em Tournament, 1,000/2,000 Blinds, 200 Ante, 8 Players
LeggoPoker.com - Hand History Converter

BB: 36,674
UTG: 51,222
UTG+1: 123,826
MP1: 62,728
MP2: 55,541
Hero (CO): 90,151
BTN: 103,617
SB: 42,716

Pre-Flop: (4,600) J J dealt to Hero (CO)
4 folds, Hero raises to 4,000, BTN raises to 11,500, 2 folds, Hero???

[siac0]

If you have an active , non nitty image make it 22k, call a shove. Stack sizes of blinds may make it slightly less likely he has air, but still happy to get it in.