Help with a few Latin questions? That'd be awesome!
1) Nonne in Campania est?
a) Where is Campania?
b) He is in Campania, isn't he? <-- my guess
c) He is not in Campania, is he?
d) Where is he?

2) Num Vesuvius populum terruit?
a) Did Vesuvius frighten the people? <-- my guess
b) Vesuvius did not frighten the people, did it?
c) Vesuvius did frighten the people, didn't it?
d) Were the people frightened by Vesuvius?

3) Nonne familiae in casis mansuerunt?
a) Which families remained in the houses?
b) The families remained in the houses, didn't they? <-- my guess
c) Aren't the families going to remain in the houses?
d) The families will remain in the houses, won't they?

4) Ubi navigavisti?
a) Why did you sail?
b) When did you sail? <-- my guess
c) You are sailed aren't you?
d) Who sailed?

5) Estne Vesuvius nunc ibi?
a) Is he at Vesuvius now?
b) Where is Vesuvius now?
c) Isn't Vesuvius there now? <-- my guess
d) Is Vesuvius there now?

Thanks for all help!