pp2_10_1 may be too complicated for chapter 2

[bnmnetp]

Describe the bug In the early going of the semester a lot of students (and professors) are having a really hard time getting this right. Its pretty long and complicated for so early in the semester.

I added a showeval of a somewhat simpler problem, which I apologize for pushing directly to master @presnick and @laumurph . If you hate it we can always make a new PR to change it.

I think having the showeval first will probably alleviate some of the pressure on this one, but I also wondered if this was moved here from a much later chapter.