Activity E has four immediate predecessors: A, B, C, and D. Each of A, B, C, and D will be completed at a random time uniformly distributed between 5 and 15. Using 5000 iterations of simulation, find the average earliest start time for E.

(hint: you can use "=randbetween(5,15)" for the completion time of A, B, C, or D in Excel. The maximum ( "=max(...)" ) of those values is the earliest start time of E. And if you use a row to find the earliest start time for E, you can copy that row for independent iterations of the simulation)