3 . Car A has a mass of1,500 kg and travels to the right with a speed of 20 m/s. Car B initially travels to the left with a speed of 10 m/s. After the vehicles collide, they stick together, moving left with a common speed of 5 m/s. Justify all answers thoroughly. (a) Calculate the mass of Car B. (b) This collision is not elastic. Explain why not. (c) Describe specifically a collision between these two cars with the same initial conditions, but which is notelastic, and in which the cars bounce off one another. (d) Is the collision elastic when Car 8 remains at rest after the collision