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Cache performance model

L1 cache : hit ratio 0.8 access time = 2.5 ns

L2 cache: hit ratio 0.95 access time = 10 ns

L3 cache: hit ratio 0.99 access time = 40 ns

main memory access time = 200 ns

Please find an average memory access time of this cachemodel.

1. A CPU is equipped with a cache; Accessing a word takes 20 clockcycles if the data is in not in the cache and 5 clock cycles if thedata is in the cache. What is the effective memory access time
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