Car 1 has a mass of m1 = 65 103 kg and moves at a velocity of v01 = +0.66 m/s. Car 2, with a mass of m2 = 92 103 kg and a velocity of v02 = +1.2 m/s, overtakes car 1 and couples to it. Neglect the effects of friction in your answer. Determine the velocity of their center of mass before the collision