A Mercedes Benz with mass 1.8×10^3 kg is traveling east bound at +15.0 m/s, while a compact car with mass 9.00×10^2 kg is traveling west bound at -15.0 m/s. The cars collide head-on, becoming entangled. Find; The speed of the entangled cars after the collision. The change in the velocity of each car. The change in the kinetic energy of the system consisting of both cars.