4. Given that main memory is composed of three-page frames for public use, and that a program requests pages in the following order: a, b, a, b, f, d, f, c, g, f, g, b, d, e answer the following questions. a. Using the FIFO page removal algorithm, perform a page trace analysis indicating page faults with asterisks (*). Then compute the failure and success ratios. [2pts] b. Using the LRU page removal algorithm, perform a page trace analysis indicating page faults with asterisks (*). Then compute the failure and success ratios. [2pts] c. What conclusions do you draw from this comparison of FIFO and LRU performance? Would you make general statements from this example? [1pt] Note: Failure rate= Number of Interrupts/Page Requests I