3. A dart is thrown horizontally with an initial speed of 15 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.5 s later. (a) What is the distance PQ? (b) How far from the dart board is the dart released? 4. The certain world-record motorcycle jump is 77 m, set by Jason Renie. Assume that he left the take-off ramp at 12 to the horizontal and that the take-off and landing heights are the same. Neglecting air drag, determine his take-off speed.