Three identical cars are being unloaded from an automobile carrier. Cars B and C have just been unloaded and are at rest with their brakes off when car A leaves the unloading ramp with a velocity of 6 ft/s and hits car B, which hits car C. Car A then again hits car B. The velocity of car B is 5.25 ft/s after the first collision, 0.630 ft/s after the second collision, and 0.709 ft/s after the third collision. Determine: a. the final velocities of cars A and C
b. the coefficient of restitution for each of the collisions