3.8. A driver going too fast for the icy conditions sees a truck stopped ahead and slams on the brakes. Their car (mass = 1000 kg) skids along the icy road and collides with the truck (mass - 3000 kg). Accident investigators determine that the car's speed was 40 km/h just before the collision and it was still moving in the same direction at 5.0 km/h just after the collision. (a) What was the velocity of the truck just after the collision? (b) What was the coefficient of restitution of this collision? (c) During the collision, how much kinetic energy was converted to heat, sound, and forms of energy other than kinetic energy?