A sequential circuit has the following transition table: Present Next State State A B x=0 A B x=1 A B Output x=0 x=1 Z Z --- --- --- --- 0 --- 0 0 0 0 0 1 0 1 0 1 1 0 0 10 1 0 1 1 0 1 1 1 1 1 1 1 000 E 1 a) Derive the circuit state and output equations. b) Derive the circuit using D flip flops. c) Derive the circuit using RS flip flops.