On a cold winter day, a penny (mass 2.50 g) and a nickel (mass 5.00 g) are lying on the smooth (frictionless) surface of a frozen lake. With your finger, you flick the penny toward the nickel at a speed of 2.05 m/s.

(A) The coins collide elastically and calculate both their final speeds.

(B) What are the directions of their final velocities?