Problem 1
run p1.py first and then run p1_plot.py to make plot.
Problem 2
run p2.py.
Problem 4
p4.py creates networks for problem 4 (a) and (b)
p4-c.py build graphs for problem (c)
run p1.py first and then run p1_plot.py to make plot.
run p2.py.
p4.py creates networks for problem 4 (a) and (b)
p4-c.py build graphs for problem (c)