Question #4 (6 mark): Given a sequential circuit (shown in the figure below) that has two D flip-flops A and B. two inputs X and Y, and one output Z. a) [2 marks] Write the logic function for the flip-flops inputs DA and DB, as a function of X, Y, A and B. b) [1 mark] Write the logic function for the output Z as a function of A and B. c) [3 marks] If the present state of A and B are A = 0 and B=1, and the circuit inputs are X = 0 and Y=1. Then, what will be the next state values for the flip-flops A and B? What will be the value of output Z, in this case? AQ ol DB