Aprogram has 1 million instructions. 10% of the instructions are of type i with cpi 3, 20% are type ii with cpi 1, 30% are type iii with cpi 2 and the rest are type iv with cpi 1. it is executed on a computer of which the clock rate is 2 ghz. during the run, 10% of instructions are executed once, 30% twice, 40% ten times, 10% 100 times and the rest not executed. how much exact time in seconds is the execution time?