One block, is 1kg going at speed of 3m/s whch hits the big block (stationary) whose mass is 2kg.

The collision is perfectly elastic. There is no friction. Find all of the following.

a. Velocity of small block after collision.
b. velocity of large block after collision
c. highest height reached by large block as it goes up the incline.

Please help, I have a physics test in 2 days! and I need to know how to do this.