do 21 and 22 only ( show your work)

For Exercises 18-29, match the gate with the description of the operation or the diagram. A. AND B. NAND C. XOR D. OR E. NOR F. NOT 18. Inverts its input. 19. Produces a 1 only if all its inputs are 1 and a 0 otherwise. 20. Produces a 0 only if all its inputs are 0 and a 1 otherwise. 21. Produces a 0 only if its inputs are the same and a 1 otherwise. 22. Produces a 0 if all its inputs are 1 and a 1 otherwise