A sequential circuit has two inputs, w1 and w2, and an output, z. Its function is to compare the input sequences on the two inputs. If w1 = w2 during any four consecutive clock cycles, the circuit produces z = 1; otherwise, z = 0. For example w1 : 0 1 1 0 1 1 1 0 0 0 1 1 0 w2 : 1 1 1 0 1 0 1 0 0 0 1 1 1 z : 0 0 0 0 1 0 0 0 0 1 1 1 0 Derive the state table.