Shower Vent and Tie in

Hi,

I had my town inspector out and he wants a dry vent on the shower and Wye connector from the main trunk. My question is can I use a Wye connector on the 2″ shower pipe to the vent pipe or should I have used a sani t? My other question is I used a street 90 from the Wye connector off the 3″ main is this ok?

Thanks!