Given the following next state and output equations for a synchronous sequential circuit:
Q1+ = D1 = X1X0Q1 + Q1Q0 + X1Q0
Q0+ = D0 = X1Q1' + X0Q1' + X1'Q0 + X0'Q0
Z = Q1Q0'
a. Construct the transition table (state table) for the circuit showing present states, next states and outputs.
b. Draw a state graph for the circuit.