A Moore circuit has one input (x) and one output (z). z-1 if and only if the previous four inputs were not a valid BCD encoding of a decimal digit; otherwisc, z 0. Assume the BCD digits are received least significant bit first. Derive a state table for the circuit. Assume that in the reset state all previous inputs were 0 Next State State 0 Previous 4 bits were 00 0 Previous 4 bits were -001 0 Previous 4 bits were 10 Previous 4 bits were--11 or-101 invalid digit) Next State State 0 Previous 4 bits were 00 Previous 4 bits were-001 0 Previous 4 bits were -10 Previous 4 bits were--11 b. 0 | Next Stane Seate Meaning 0 Previous 4 bits were 00 0 Previous 4 bits were10 1 Previous 4 bits were .. 11 C. 3 3 or-101 invalid digit) Next State State Meaning 0 Previous 4 bits were 00 0 Previous 4 bits were-001 l Previous 4 bits were -10 Previous 4 bits were or-101 invalid digit)