8. We have seen that the operators {+, ,-)are functionally complete. It is easy to show that {+,-} and { . ,-} are two smaller sets of operators that are functionally complete (by using the same technique as the previous exercise). In this exercise, we will show that the even smaller set(l) is complete. is the NOR operator, which means x y = x + y. a) Express with only x and the operator. [2 pts Name: |Student ID: b) Express xy with only x, y and the operator. 13 pts] c) Conclude that the set {J} is complete. [2 pts] d) Verify it by expressing xtyz using only x, y, z and the l operator. [3 pts]