8. [1 mark] Given a sequential circuit design (shown in the figure below) that has two D flip-flops A and B, two inputs X and Y, and one output Z. Write the logic function for the flip-flops inputs DA and DB, as a function of X,Y,A and B. a. DA=XY+XADB=YB+XB b. DA=XY+XADB=YB+XB c. DA=XY+XADB=YB+XB d. None of them 9. [I mark] Given a sequential circuit design (shown in the figure below) that has two D flip-flops A and B, two inputs X and Y, and one output Z. Write the logic function for the output Z as a function of A and B. a. Z=AB b. Z=AB c. Z=AB d. Z=AB 10. 0.5 mark) 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? a. Z=AB=1,1=1 b. Z=A+B=1,0=0 c. Z=AB=0,1=0