Law of Conservation of Momentum: Collisions

1) A 0.17 Kg cue ball is moving at 20 m/s on a pool table and hits a stationary blue ball. After the collision the two bounce off each other and the cue ball keeps moving at 5 m/s. How fast does the blue ball move after being hit?

A) 15 m/s
B) 20 m/s
C) 25 m/s
D) 30 m/s