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A playground is on the flat roof of a city school 6.00 m above the street below (Fig. P4.25). The vertical wall of the building is h 5 7.00 m high forming a 1-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 u 5 53.0° above the horizontal at a point d 5 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. (b) Find the vertical distance by which the ball clears the wall. (c) Find the horizontal distance from the wall to the point on the roof where the ball lands.