Answer the following by considering a page-reference string having 22 page references with seven unique page references. a. Give steps and calculate for Optimal Page Replacement algorithm number of...

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Extracted text: Answer the following by considering a page-reference string having 22 page references with seven unique page references. a. Give steps and calculate for Optimal Page Replacement algorithm number of page faults by considering 4 frames and 6 frames. b. Give steps and calculate for Least Recently Used algorithm number of page faults by considering 4 frames and 6 frames. c. Write the pseudocode/Algorithm for the best performing page replacement algorithm among the Optimal Page Replacement and Least Recently Used algorithm for the given scenario. Note: All frames are initially empty, so your first unique pages will cost one fault each.