I looked up the solution

[Jay McCarthy]

We were on the right track, it's just not simple because there's a lot
of busy work that I didn't want to go through. I think next class I
will walk you through (unrecorded) the proof in the book's solution
set. I hope that will be satisfying.

Jay

--
Jay McCarthy <j...@cs.byu.edu>
Assistant Professor / Brigham Young University
http://faculty.cs.byu.edu/~jay

"The glory of God is Intelligence" - D&C 93