A sequential circuit is to be used to identify possible noncodewords produced by a 3-out-of-6 code generator circuit. The sequential circuit will examine the output of the code generator circuit 1 bit at a time. After all 6 bits have been examined, the circuit produces an output of 1 if it detects a noncodeword; otherwise an output of 0 is produced. Derive the excitation and the output expressions for the circuit assuming it will be implemented using a PAL22V10 device.