A small (25 g) highbounce ball is stacked on top of a large (100 g) highbounce ball, and the two balls are dropped to the floor together from a height of about 1 m. The large ball strikes the floor first and rebounds upward to collide with the falling small ball. At the instant of the collision, the large ball has a velocity of 4.4 m/s upward, and the small ball has a velocity of 4.4 m/s downward. If the collision between the two balls is perfectly elastic, how fast is each ball moving immediately after impact?