A ball is thrown vertically upward (assumed to be the positive direction) with a speed of 19.0 m/s from a height of 4.0 m. (a) How high does the ball rise from its original position? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is the ball's velocity when it returns to the level from which it started? m/s