Lab4

I commented out all text I didn't keep. There are also pictures in this folder that aren't being used right now. Should I delete these?
This reference was via Dr. Jarvis's suggestion. This lab does not depend on Volume 2; I just want to refer the reader to something in case they want a more rigorous presentation of complexity. Kind of like how we reference the online documentation all the time. I'm pretty sure this is a good reference, but we can discuss it more if you want.