First Marathon on Sunday- questions

Hi everyone!!

I am running my first marathon on Sunday in Newport, RI and extremely excited!!

I’ve been having some issues trying to set a goal in my mind regarding a pace. I did all my long runs at about a 10 min mile; however my half marathon is a 1:48 and 5k is 22 mins. Any suggestions on what someone thinks my pacing strategy should be as my longest long run in my training cycle was 17 miles.

Thank you!!