Question 5: Memory Management (25 points) a) What are the three major activities of an operating system in regard to memory management? (4.5 marks) b) Differentiate between: i. Internal and external fragmentation. (3 marks) First-fit, Next-fit and Best-fit memory allocation techniques (6 marks) Release-match and Age-match memory allocation technique (3 marks) c) Given memory partitions 100KB, 500KB, 200KB, 300KB, and 600KB (in order), show how First-fit, Next-fit and Best-fit memory allocation techniques place processes of 212KB, 417KB, 112KB, and 426KB (in order). Which algorithm makes the most efficient use of memory? (8.5 marks)