A person plays with a tennis ball in a large room and tries to throw the ball from one end of the room and hit a picture hanging h = 30 cm from the ceiling on the opposite end of the room. It is assumed, that the person throwing the ball, throws the ball in the same height as the picture. The ball just barely avoids touching the ceiling. The room is L = 10 m long. a) Determine the initial speed of the ball, the initial angle and duration of ight if the ball has to hit the picture