2. Assume a logic system has 4 binary inputs a,b.o,d and 4 binary outputs w.x,Y,Z. The truth tab le of the system is specified below: abed WXYZ 0000 0101 0001 0010 0010 1010 0011 0111 0100 1011 0101 1011 0110 1010 1000 0000 1001 0011 1010 0000 1011 0111 1100 1101 11011110 1110 0101 2.1 Fill up the Karnaugh maps and derive the simplified expressions of w,x.x.z. (10 points) ab ab 00 01 11 10 00 01 11 10 01 01 10 10 cd00 01 ab cd 00 01 11 10 01 01 10 10