014 kg marble sliding to the right at 27.2 cm/s on a frictionless surface makes an elastic head-on collision with a 0.014 kg marble moving to the...

A 0.014 kg marble sliding to the right at 27.2 cm/s on a frictionless surface makes an elastic head-on collision with a 0.014 kg marble moving to the left at 21.8 cm/s. After the collision, the first marble moves to the left at 21.8 cm/s. Find the velocity of the second marble after the collision. Answer in units of m/s