can someone please help me in doing part c. i have done everything else i just dont understand how to do nor gates and nand gates

One problem 30 points Design a combinational circuit that has four inputs A,B,C and D, and one output Z. The output is 1 iff the input has three consecutive 0 's or three consecutive 1 's. For example, if A=1, B=0,C=0, and D=0, then Z=1.but if A=0,B=1, C=0, and D=0, then Z=0. SOP for Z. Each part is 10 points a. Give the SOP canonical minterm of Z b. Give the simplest SOP for Z using K-map simplification c. Implement Z in part (b) using NOR gates only