0 A sequential circuit has two JK flip-flops A and B, two inputs x and y, and one output z. The flip-flop input equations and circuit output equation are JAJBz=Ax+By=Axy=Ax+ByKA=BxyKB=A+Bx (a) Derive the simplified state equations for A and B. (b) Tabulate the state table. (c) Draw the state diagram of the circuit