Answer from cs61c-eb (Dae-Yeon Kim 16568138) for Question 3
5
If I simplify the expression
E = A.(BC- + CB-)
There will be two wires necessary to invert C and B.
There will be 1 wire to give AND of B and C-, 1 wire to
give AND of B- and C, and the last to feed the OR of
BC- and CB-.