a. Construct a negative edge-triggered D flip-flop using three-S-R latches. Draw the logic diagram and also list its function table. Add asynchronous active-low Preset and Reset inputs as direct inputs. b. A certain flip-flop has four operations: Clear to 0, No change, Complement output, and Set to 1, when inputs M and N are 00, 01, 10, and 11, respectively:- Tabulate the characteristics table Derive the characteristics equation iii. List the excitation table iv. Show how the flip-flop can be converted into a D flip-flop Draw the state diagram and complete the following timing diagram for a JK flip-flop with a falling-edge trigger and asynchronous Cirn and PreN inputs. ii. C. CIN