Chapter 7: Exercise 6, 9, 10 and 11
Figures for chapter 7 exercises

Change-Id: Ic73509675ce2d28279158895acd13a36f722569b
6(b) debug
6(b) k=8 gives minimum cut
Merge pull request #30 from sjuvekar/master

Chapter 7: Exercise 6, 9, 10 and 11