Solve the all parts of given problem:
Problem: An airplane pilot fell 350m after jumping from an aircraft without his parachute opening. He landed in a snow bank, creating a crater 1.5m deep, but survived with only minor injuries. Assuming the pilot's mass was 79kg and his terminal velocity was 37m/s.
Part I: Estimate the work done by the snow in bringing him to rest.
Part II: Estimate the magnitude of the average force exerted on him by the snow to stop him.
Part III: Estimate the work done on him by air resistance as he fell.
I need help to find the magnitude of the average force exerted on him by the snow to stop him and express your answer using two significant figures.