Consider a demand-paging system with a a paging disk that has an average access and transfer time of 50 ms. addresses are translated through a page table in main memory, with an access time of 5 us per memory access. thus, each memory reference through the page table takes two accesses (i. e. 10 us). to improve this time, we have added an associative memory (tlb) that reduces access time to 6 us, if the page-table entry is in the associative memory. assume that 60% of the accesses are in the associative memory, and that, of the remaining, 10% (or 4% of the total) cause page faults. what is the effective memory access time?