1. Use a Karnaugh map to find the minimum AND-OR expression for x(a,b,c,d):

A) ?(1,5,6,7,9,12,13,15)

B) ?(7)

C) ?(1,2,3,4,5,6,7,12,15)

D) ?(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14)

2. Implement the 2x4 binary decoder with an enable input, as shown in figure. Draw a nonabbreviated diagram of your circuit.

3. Modify figure to provide 2 additional outputs, one for the N bit and one for the Z bit.

DO 2 x4 DI Decoder D2 D3