3kg softball has a velocity of 15 m/s at an angle of 35 degrees below the horizontal just before making contact with the bat.

A .3kg softball has a velocity of 15 m/s at an angle of 35 degrees below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball while in contact with the bat if the ball leaves with a velocity of (a) 20 m/s, vertically downward, and (b) 20 m/s, horizontally back toward the pitcher?