Suggested answers. Many will vary with the live data, so check units and working. The curriculum links are a guide only.
19:00 + 7 h = 02:00 New York time. London is 5 hours ahead, so 07:00 the next morning. (The gap is sometimes 4 hours for a few weeks a year when the clocks change on different dates.)
Zulu is the aviation name for the letter Z, which marks UTC (Coordinated Universal Time), the time at 0° longitude.
So flight plans, weather reports and radio calls mean the same thing everywhere, with no confusion crossing time zones.
Answers will vary. A rule of thumb is one hour per 15° of longitude, but countries set their own time zones and clocks.