PLEASE SHOW WORK STEP BY STEP VERY CLEARLY, THANK YOU.

Problem 3 A man is standing in an elevator which is accelerating upward at a constant rate of 3.5 m/s. The man's mass is 65 kg. (a) Draw a free body diagram of the man, labeling all forces that act on him. (b) Find the normal force that the floor of the elevator exerts on the man. Show all work including how you derive the expression for the normal force. (c) If the elevator accelerates downwards at the same rate, what would be the normal force? Show all work including how you derive the expression for the normal force