MA351 Homework 4
Due at 4:59pm in my mailbox in SAS 3151, Thursday, November 16, 2017
All solutions must be submitted in hardcopy
either to me in class or placed in my mailbox.
Note my office hours on my schedule.

DMM §3.6, Problem 13, page 168.
Note that your coloring also needs to include the
country "11" surrounding countries 110.

DMM §3.6, Problem 19, page 169.

Please show that the Boolean functions a ∧ b and a ∨ b can
be expressed as formulas using only the binary Boolean operator
nand (Sheffer stroke; not and):
nand and the variables a and b can occur multiple times.