Final answer:
The first people to see the sunrise are in the GMT+12 time zone, and the last people to see the sunset are also in the GMT+12 time zone.
Step-by-step explanation:
The first people to see the sunrise would be in the GMT+12 time zone. This is because GMT+12 is the first time zone to experience a new day, as time zones are roughly based on 15 degree segments of longitude, with adjustments for political and practical reasons, resulting in 24 standard global time zones. Since the Earth rotates from west to east, places east of the Prime Meridian experience sunrise earlier than those to the west.
Similarly, the last people to see the sunset would also be in the GMT+12 time zone, as it would be the last to experience the end of the day before the date line is crossed and a new day starts in the next time zone to the east, which actually is the GMT-12 time zone.