The various operations in a computer are stored either in the cache or memory. Franko phones, a computer assembly plant in Ghana has come out with a three-level cache computer. If their computer has main memory access time 1200ns and the first, second and third caches have 500ns, 400ns and 200ns access times respectively. a) generate an equation for computing the average access time of the new computer.  b) Using your equation determine the average access time c) Assuming cache 2 goes down, but this does not affect the operation of the computer, refine your equation in “a” above and compute the new average access time.

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