2. Consider a paging system where the page table is stored in the translation look aside buffer (TLB). The hit ratio is 99% meaning the page table entry will be found in TLB 99% of the time. The normal memory access time is t1.7 microseconds whereas TLB access is 0.1 microseconds. When calculating the effective paged memory access time, why is the cost of a TLB miss the sum of TLB access time plus normal memory access time? a. b. If we consider only swap-in/swap-out time and if swap-in-time- swap-out-time - 18 milliseconds, and, on the average, 85% of the pages are dirty, what is the effective page fault service time? c. If we consider only memory and TLB access time what is the effective access tine