Please explain number 26,36,37, and 38. Thank you!

A man of mass 70 kg stands on a scale in an elevator. If the scale reads 625 N, the elevator must be moving upward at constant speed moving downward at constant speed accelerating upward accelerating downward standing still mpowgs 36. A frictionless plane, 5 meters in length is inclined at an angle of 27. A small block of weight 20 N is placed at the top of the plane and allowed to slide down. About how much time will it take to reach the bottom of the plane? You must show work for credit. (obviously not to scale) 37. Find the initial horizontal and vertical velocities, the maximum height, the time the ball is in the air, the range, the final velocity, and the angle the canon ball hits the ground for the canon above. 38. Aball is thrown down from a height of 222 m and takes 2.2 sec to hit the ground. What was the initial velocity