Consider a three-level memory system, where the access time for the cache is T1 nanoseconds, main memory access time is T2 microseconds, and disk access time is T3 milliseconds. Main memory hit ratio is estimated to be 40%. a) What are the minimum and the maximum possible access times? Show your work. b) If the cache hit ratio H is 60%. What is the relation between T1, T2, and T3 to achieve an average access time less than 10 * T1. Show your work.

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