a playground is on the flat roof of a city school, 4.6 m above the street below (see figure). the vertical wall of the building is h = 6.00 m high, to form a 1.4-m-high railing around the playground. a ball has fallen to the street below, and a passerby returns it by launching it at an angle of ? = 53.0deg above the horizontal at a point d = 24.0 m from the base of the building wall. the ball takes 2.20 s to reach a point vertically above the wall. (a) find the speed at which the ball was launched. ms (b) find the vertical distance by which the ball clears the wall. m (c) find the horizontal distance from the wall to the point on the roof where the ball lands. m