An object of mass 10kg travelling from left to right at 12ms-1 collides with an object of mass 9kg which is travelling at 6 ms-1 from right to left. The 9kg object bounces back at 2ms-1. Hint: left to right positive direction and right to left negative direction. Determine:
i. The momentum of the 10kg object before collision

ii. The momentum of the 9kg object before collision

iii. The total momentum of the system before collision

iv. The momentum of the 9kg object after collision

v. The momentum of the 10kg object after collision

vi. The velocity and direction of the 10kg object after collision