9. (4 points) What is the kernel of an operating system? WHat is a monolithic kernel? What is a mikrokernel? 10. (4 points)Briefly explain five storage management responsibilities of a typical operating system. 11. (4 points)Briefly explain the difference between a real (physical) address and a virtual address. 12. (4 points)What is multithreading? What type of applications is it useful for? Give an example not given in the book or lecture. 13. (4 points)What are the key design issues for an SMP operating system? 14. (15 points)Suppose that a system running for 24 hours has the following up times