9. (15 points) Two objects with masses m1 = 2 kg and m2 = 8 kg make an inelastic collision and then moves with final velocities, Ūif = 4î – 3ị (m/s) and ū2f = 8î + bị (m/s) after collision. If the impulse on mı during the collision is ſi = -32î + 24ſ (Ns), a) find the total final momentum of the system. b) Calculate the velocities of objects before the collision. c) Assuming that the time of impact is 0.02 s, calculate the average force acting on each object during the collision.