Physics problem involving collisions

In a pool game, the cue ball, which has an initial speed of3.0m/s, make an elastic collision with the eight ball, which is initially at rest. After the collision, the eight ball moves at an angle of40to the original direction of the cue ball.(a) Find the direction of motion of the cue ball after the collision.        50(from the original line of motion)(b) Find the speed of each ball. Assume that the balls have equal mass._____________m/s (cue ball)______________ m/s (eight ball)Part A is correct, I just need help with part b.