In figure, a ball is thrown up onto a roof, landing some timelater at height h = 20.0 m above and d = 30.0 mhorizontally from the release point. The ball's path just before landing is angled at θ = 60.0o with the horizontal roof. (a) Find the time of flight. (Hint: One way is to reverse themotion, as if on a videotape.) What are the (b) magnitude and (c)angle (relative to the horizontal) of the ball's initialvelocity?