I need help with some physics problem. Question Ball 1 with a mass of 1150 g tra

I need help with some physics problem.
Question
Ball 1 with a mass of 1150 g traveling 3.50 m/s to the right collides with Ball 2 of mass 850 g that is initially at rest. After the collision, Ball 2 is traveling 4.03 m/s. What is the velocity of Ball 1 after the collision?