Question: Memory operations currently take 6 0 % of execution time. A new widget called a cache speeds up 5 0 % of memory operations by

Memory operations currently take 60% of execution time. A new widget called a cache speeds up
50% of memory operations by a factor of 4. A second new widget called a L2 cache speeds up
the remaining 50% by a factor of 2. What is the total speed up?

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