A project has three activities A. B, and C that must be carried out sequentially; in order of A, then B, then C. The probability distributions of the times required to complete each of the activities A. B, and C are uniformly distributed in Intervals [1,7), [2,5) and (3.5) respectively. Run 1000 simulation trials in Excel. The "total project completion time" is a(n). O Output of the simulation O Input of the simulation Decision variable In the simulation O A fixed value in the simulation D Question 9 2 pts For the above project having three activities A. B. and C that must be carried out sequentially, The standard deviation of the project completion time in the project described above is closest to: O 189 @ 147 209 0 235 163