1. An Exclusive NOR (XNOR) gate is a 2-input gate whose output is I if and only if both of its inputs are equal. Write a truth table, sum-of-products expression, and gate corresponding AND-OR circuit for the Exclusive NOR function.
2. From the point of view of switching algebra, what is the function of a 2-input XNOR gate whose inputs are tied together? How might the output behavior of a real XNOR gate differ?