I'm on two separate tickets on AZ BOS-FCO and FCO-NAP.

What is the minimum connecting time for AZ at FCO, arriving from Boston at 12:45pm, connecting to Naples?

The FCO-NAP flight departs at 2:30pm flight...so that's 1 hour and 45 minutes. Is that enough time? Comfortably? Will I have to change terminals? Arrival is on a Saturday in May.

If I'm on two separate tickets (BOS-FCO-BOS and FCO-NAP), will the airline check my bags through? Also, will they acknowledge this as a connection/complete journey if presented upon checkin in BOS and cover me for a later FCO-NAP flight if I miss my flight to Naples because my flight from Boston is late?