Pleeeassee help its quiet simple i promise its just that im young lol please add explanation

Ascuba diver was 80 feet below sea level and swam up at a rate of 4 feet per minute. the two solutions show how long it took the scuba diver to reach an elevation of 20 feet below sea level. lydia and max used the methods shown below to find the time it took the diver to reach the new elevation.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.