Could someone help me with these questions? Thanks!

Question

a) A cargo plane left Vancouver, British Columbia (time zone −8) at 3:00 p.m. on a Monday. The plane flew for 11 h to Paris, France (time zone +1). At what local time and on what day did the plane land in Paris?
b) The plane left Paris 3 h later for the return flight to Vancouver. Strong headwinds slowed the plane, so this flight took 12 h. At what local time and on what day did the plane land in Vancouver?
c) After some maintenance work, the plane next left Vancouver at 11:00 a.m. on Wednesday for Honolulu, Hawaii (time zone −10). The plane landed in Honolulu at 3:00 p.m. local time that day. How long did the flight take?

Answer 1

3pm + 11hrs flight = 2am + 9 hrs TZ = 11 am

do the others in like wise.