A 0.060-kg tennis ball, moving with a speed of 2.50m/s, collides head-on with a 0.090-kg ball initially

Question:

A 0.060-kg tennis ball, moving with a speed of 2.50m/s, collides head-on with a 0.090-kg ball initially moving away from it at a speed of 1.15m/s. Assuming a perfectly elastic collision, what are the speed and direction of each ball after the collision?