In this particular case using a K-map to simplify the problem will not be very useful since
adjacent cells in a K-map vary by only one bit, and because this is a parity function every
adjacent cell will be opposites.
Starting with the truth t
(a) The input signals to this system are: # dimes and # of nickels in the reservoir, ND and
NN, respectively, and coin deposited, C. The outputs are: no change, E, # dimes and #
of nickels to return, RD and RN, respectively.
(b) ND and NN are