Given the information in the question and the table below:
Checkpoint Altitude (feet above sea level)
Checkpoint 1 -102
Checkpoint 2 2408
Checkpoint 3 0
Checkpoint 4 -182
Checkpoint 5 1657
(a) Which checkpoint is the farthest below the sea level?
The checkpoint that will be the farthest below the sea level is Checkpoint 4 with an altitude of -182 feet which is the lowest altititude.
(b) Which of the checkpoints is the farthest above the sea level?
The Checkpoint that is the farthest above the sea level is checkpoint 2 which has the highest altitude of 2408 ft.
(c) What does it ean for a check point to have zero altititude?
The Zero altitude means the checkpoint is at the sea level.