Question #4_(4 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) [1 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) [2 marks] If the present state of A and B are A = 0 and B = 1, and the circuit inputs are X = O and Y1. 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? DA DB