Operating Systems Question

Answer carefully and completely for a thumbs up

I know part (a), need help with other parts.

Question 1 (a) An operating system is the most important software that runs on a computer. Explain clearly why the operating system is needed. (b) Explain how clients and server processes communicate with each other in the microkernel structure. Discuss the main benefits and weakness of the microkernel. Memory management is a crucial aspect of operating system functionality.A common problem that needs to be addressed is that of memory fragmentation Explain - with examples -how both internal and external memory fragmentation occur. (c) (d) Consider the following bitmap, where shaded boxes represent allocated memory and un-shaded boxes represent available memory: 5161789 Assume two memory allocation requests are processed by the system: firstly the system is asked to allocate 4 blocks of memory for process A. After this is successful, the system is asked to allocate a further 1 block of memory for another process B. State which blocks from the above bitmap would be allocated to which process when using the First Fit memory allocation algorithm. (i) State which blocks from the above bitmap would be allocated to which process when using the Best Fit memory allocation algorithm. (ii) (ii) State which blocks from the above bitmap would be allocated to which process when using the Worst Fit memory allocation algorithm. (f) Operating systems typically have to manage system and hardware resources. Describe two resource limitations that mobile operating systems have to manage