Height of Pendulum Homework: A&B Answered, C&D Yet to Solve

[Taylor22]

Homework Statement

In the two-sphere arrangement of Figure, assume that sphere 1 has a mass of 51 g and an initial height of 10 cm, and that sphere 2 has a mass of 82 g. After sphere 1 is released and collides elastically with sphere 2, what height is reached by (a) sphere 1 and (b) sphere 2? After the next (elastic) collision, what height is reached by (c) sphere 1 and (d) sphere 2?

I found A and B but not sure how to find c and d?

Homework Equations

The Attempt at a Solution

Sqrt(2gh)= v

((m1-m2)/(m1+m2))v=v1
(v1^2)/(2g)=H1

[/B]

 

[haruspex]

Since you have not attached the figure, you will need to describe the arrangement.