Impulse on a baseball

A baseball of mass m = 0.14 kg is thrown towards home plate at 100 mph. The batter whacks it squarely and sends it back towards center field at a speed of 150 mph.

What is the ball's initial momentum?
What is the ball's final momentum?

What is the impulse, defined as the change in momentum


       impulse  =   (final momentum)  -  (initial momentum)

If the ball is in contact with the bat for about t = 0.0007 s, then what is the average force on the ball during that time?

For more information

Forces between Bat and Ball goes into more detail on the collision of a bat and ball.