Solving Speeds of Objects after Collision with Two Angles

[Oriako]

Homework Statement

A 0.17kg cue ball is moving at 4.0 m/s when it strikes a 0.16 kg stationary object ball. After the collision, the cue ball moves 60 degrees to the left of its original direction while the object ball moves 30 degrees to the right of the cue ball's original path. Determine the speed of the:
a) Cue ball after the collision. [ANS: 2.0 m/s]
b) Object ball after the collision. [ANS: 3.7 m/s]

Homework Equations

Conservation of Momentum

The Attempt at a Solution

[PLAIN]http://img89.imageshack.us/img89/1425/dscf2042x.jpg

Please help, thank you.
I need this for tomorrow morning!

 

[Oriako]

This is urgent! Please help! Thank you so much.