A professor going to work first walks 500 m along the campus wall, then enters the campus and goes 100 m perpendicularly to the wall towards his building, after that takes an elevator and mounts 10 m up to his office. The trip takes 10 minutes. Calculate the displacement, the distance between the initial and final points, the average velocity and the average speed. X Az 500 m d,d 10 m 3 100 m y