Final answer:
The seagull is 5 meters above sea level, the kayaker is at sea level, the diver is 2 meters below sea level, and the dolphin is 6 meters below sea level. The distance between the seagull and dolphin is 11 meters, between the dolphin and kayaker is 8 meters, and between the diver and dolphin is 4 meters.
Step-by-step explanation:
a. The seagull is 5 meters above sea level, the kayaker is at sea level, the diver is 2 meters below sea level, and the dolphin is 6 meters below sea level.
b. i. The distance between the seagull and dolphin is 11 meters. ii. The distance between the dolphin and kayaker is 8 meters. iii. The distance between the diver and dolphin is 4 meters.