README: Lab 2
-------------

(1) In file answers.txt, fill in the truth table columns for
    (i)   (ab+c)
    (ii)  (a+b'+d)
    (iii) (a'c + bd)
    (iv)  (a' + b' + cd)


(2) Also in answers.txt, fill in the karnaugh map for part (iv) above


(3) Also in answers.txt, write a minimal sum-of-products expression for
    the karnaugh map shown below

    ab\cd | 00 01 11 10
    ------+------------
    00    |  0  1  1  1
    01    |  0  1  0  1
    11    |  0  1  1  1
    10    |  1  0  0  1


(4) Using logisim, create a single circuit (4 inputs, 3 outputs) matching the
    expressions given below, storing your circuit as file lab2.circ in your
    lab2 repository.

       x = a + d
       y = (a'b)'(c' + d)
       z = ((cd') + b)'