Q$6)$ A sequential circuit has a single input x and a single output y$.$ When the sequence $1011$ occurs at the input, the output becomes $1.$ Initially the output is $0.($a$)$ Draw the corresponding state diagram for a Mealy machine. $($b$)$ List the state table and design the circuit using D flip$-$flops. $($c$)$ Draw the logic diagram of the circuit.