Question: In a particular system, a CPU is used for 78% of the time and a disk drive for 22 % of the time. A designer

In a particular system, a CPU is used for 78% of the time and a disk drive for 22 % of the time. A designer has two options: 

a. improve the disc performance by 40% and the CPU performance by 20%. 

b. improve the disc performance by 10% and the CPU performance by 80%.

Which is the better option, and why?

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