8) A serial adder is a circuit that has two inputs (X and Y) and one output (S). The inputs represent two binary numbers that have bit values that appear serially beginning with the lowest significant bit first. The output is the serial sum of the two numbers. The diagram below shows the behavior of this circuit for two numbers, X = ...01101 and Y = ...11100 and the sum is S= ...01001. Draw a state diagram for the serial adder. X=10110 ... = Y Y = 00111.... + S=10010