Bumper cars A and B are initially rolling freely with velocities of Va = 10 m/s to the right and Vb = 4 m/s to the right. The mass of A is 160 kg and the mass of B is 200 kg. When car A hits B from behind the speed of car B jumps to 8 m/s. Find the coefficient of restitution and velocity of car A immediately after the impact, and find the energy lost during the impact.