pls ans qstn b clearly. thank you

QUESTION 3 In most electronic devices, a small delay is required for a system to shut down safely instead of cutting off the power supply immediately. By using synchronous counter, develop a system that when the switch of a power supply is triggered, the power supply will be tum off after 10 count. Use J-K flip-flop. [15 marks] (6) Construct a state diagram that accept all strings of data that start with 1 and end with 10. [10 Marks]