1. An elevator is moving up at a constant velocity of 2.5 m/s, as illustrated in the diagram below: The man has a mass of 85 kg. a. Sketch a force diagram for the man. b. Calculate the force the floor exerts on the man. 2. The elevator now accelerates upward at 2.0 m/s. a. Sketch a force diagram for the man. b. Calculate the force the floor now exerts on the man. 3. Upon reaching the top of the building, the elevator accelerates downward at 3.0 m/s. a. Sketch a force diagram for the man. b. Calculate the force the floor now exerts on the man.