50nl: 3bet pot with 98s

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what is he's calling c-bet on flop and turn %?If he calls alot flop c-bet you may try delayed bluff.If he folding to flop c-bet alot you can try two burrels

What is hes aggr. factor on the flop,and hes CR%?
And most important,how is your table image?If he see you as TAG or nit,or is he thinks you more on loose side?
Answer this question and you have answer 2 your problem