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 with a speed of 2.25 m/s . The coins collide elastically; calculate both their final speeds.What are the directions of their final velocities, opposite or the same?