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4. Intel is considering two different possible enhancements to their newest i7 line of processors. They only have enough time to implement one of these enhancements before the scheduled release date of the processor. The instruction set of their original processor can be divided into three different types of instructions having the following CPIS: Instruction type A B CPI 1.4 2.4 2 The benchmarks that are used to evaluate processor performance consist of the following instruction mixture: Instruction type Percentage A 25% B 70% 5% Intel must choose one of the following options: 1. decrease the CPI of instruction type A by a factor of 5 (divide the CPI by 5), or 2. decrease the CPI of instruction type B by a factor of 2 (divide the CPI by 2). These enhancements will not affect the number of instructions or the clock rate. Which enhancement is preferable? You must justify your answer numerically (with calculations)