Figure 3.1 shows four identical pool balls having the same mass m. At the instant shown, ball number 2 and ball number 5 moving with the same velocity of vo = 4 m/s towards ball number 10 and number 12 in which are at rest. If the coefficient of restitution for each ball is e = 0.5, determine the velocity of each ball after the first three collisions occur. (12 marks) Figure 3.1 Movement of the pool ball