What is the average force between a ball and bat during contact provided that...? I'm STUCK?

Question

The mass of the baseball is 0.145 kg.
It is pitched at 45.0 m/s and is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s.
The contact time between bat and ball is 3.00 X 10 ^ (-3) s.

Can't get this... please help ASAP!!!

Answer 1

the change in momentum of the ball is .145 x (45+52)
the force is D(mv)/Dt=.145 x (45+52) /.003