A dolphin in an aquatic show jumps straight up out of the water at a velocity of 15.0 m/s.

a) List the knowns in this problem.

b) How high does his body rise above the water? To solve this part, first note that the final velocity is now a known, and identify its value. Then, identify the unknown and discuss how you chose the appropriate equation to solve for it. After choosing the equation, show your steps in solving for the unknown, checking units, and discuss whether the answer is reasonable.

c) How long a time is the dolphin in the air? Neglect any effects resulting from his size or orientation.