In figure, a ball is thrown up onto a roof, landing some timelater at height h = 20.0 m above and d = 30.0 m horizontally fromthe release point. The ball's path just before landing is angled atθ = 60.0o with the horizontal roof. (a) Find the time offlight. (Hint: One way is to reverse the motion, as if on avideotape.) What are the (b) magnitude and (c) angle (relative tothe horizontal) of the ball's initial velocity?