A Fast Pitch the fastest measured pitched baseball left the pitcher's hand at a speed of 45.0

Question:

A Fast Pitch the fastest measured pitched baseball left the pitcher's hand at a speed of 45.0 m/s. If the pitcher was in contact with the ball over a distance of 1.50 m and produced constant acceleration,
(a) What acceleration did he give the ball, and
(b) How much time did it take him to pitch it?