RIP2-D2

I was considering this months ago, but because I wanted to do it in a classroom setting and didn't have time before the end of the year, I was saving it for the fall.

However, with the passing of Kenny Baker, the man inside the droid we were looking for, I moved it up and reworked it.

For the record, the Volume inside a 4D hypersphere would be 1/2 * pi^2 * r^4.