Consider two different implementations, code sequence (1 and 2). There are three classes of instructions (A, B, and C) in the instruction set The processor clock rate is 2GHz. The instruction counts are in billions. CPI for each instruction class 1 Code NC 1 2 Instruction counts for each instruction class A 8 2 2 1 Calculate the execution time of code sequence 1 in seconds. (The answer is numerical value without unit)