Economics homework help

A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling a vertical distance 1.25 m from the end of the track. (a) At what height above the ground does the ball start to move?m(b) What is the speed of the ball when it leaves the track?m/s(c) What is the speed of the ball when it hits the ground?m/s