B- 1. A computer has L1 and L2 caches and main memory. Access to the L1 cache takes 10 nanoseconds (ns); access to the L2 cache takes 50 ns; access to the main memory takes 100 ns. Suppose L1 cache hit ratio is 0.4 and L2 cache hit ratio is 0.50. What is the effective access time (EAT) in milliseconds (ms) to access a referenced word on this system? (show all

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