A ball is tossed with sufficient speed straight up so that it is in the air several seconds. a) What is the velocity of the ball when it reaches its highest point? b) What is its velocity 1s before it reaches its highest point? c) What is the change in its velocity through this 1-s interval? d) What is its velocity 1s after it reaches its highest point? e) What is the change in velocity through this 1-s interval? f) What is the change in velocity during the 2-s interval? g) What is the acceleration of the ball during any of these time intervals and at the moment the ball has zero velocity?