Consider a system with memory mapping done on a page basis and using a single level page table. Assume that the necessary page table is always in memory. a. If a memory reference takes 200 ns, how long does a paged memory reference take? b. Now we add a TLB that imposes zero time overhead on a hit or a miss. If we assume that 85% of all memory references hit in the TLB, i.e., a hit ratio of 85%, what is the Effective Access Time (EAT)? c. In practice, TLB does impose a small overhead. Suppose the overhead due to TLB access is 5ns for a hit or a miss, what is the EAT with a hit ratio of 90%