A 4.90-kg ball, moving to the right at a velocity of +2.14 m/s on a frictionless table, collides head-on with a stationary 8.80-kg ball. Find the final velocities of
(a) the 4.90-kg ball and of
(b) the 8.80-kg ball if the collision is elastic.
(c) Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic.