Assume that, on average, MIPS programs execute the following mix of instructions: 50% R-type instructions 15% lw instructions 10% sw instructions 20% branch instructions 5% jump instructions a. Determine what percentage of all memory accesses during execution are for data (as opposed to instructions). b. Determine what percentage of all memory accesses are reading from memory (as opposed to writing to memory). c. Consider a machine architecture that executes at 3 GHz. Also consider that I. R-type and lw instructions execute in 5 cycles, II. Sw instructions execute in 4 cycles, and III. branch and jump instructions execute in 2 cycles What is the CPI for that machine