A ball of mass 0.440 kg moving east (+x direction) with a speed of 3.20 m/s collides head-on with a 0.320 kg ball at rest.

A ball of mass 0.440 kg moving east (+x direction) with a speed of 3.20 m/s collides head-on with a 0.320 kg ball at rest. If the collision is perfectly elastic, what will be the speed and direction of each ball after the collision