A compiler produces a program with the following mix of instructions: Instruction Class Count 1 9 2 5 3 9 If it is executed on a processor with a clock period of 8 microseconds, and the following Instruction Class CPIs, what is the execution time in microseconds? Round to the nearest 0.1 microseconds. Instruction Class CPI 1 8 2 3 3 8 A. 64.0 μs B. 65.5 μs C. 66.9 μs D. 68.3 μs
