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**completely lost:(.. plz help**

Ok I have been looking at this problem and i really don't know where to start. I've done all the other homework in my section but cannot get this. I would appreciate it if someone would help me:). Here it is.

Two particles, of masses m and 2.88m are moving toward each other along the x axis with the same initial speeds 5.81m/s. Mass m is traveling to the left and mass 2.88m is traveling to the right. They undergo an elastic glancing collision such that m is moving downard after the collision at a right angle to its initial direction.

1.Find the final speed of the 2.88m mass.

2.What is the angle at which am is scattered. Answer between -180 and +180.