You have been tasked to research and estimate the duration of a work package activity. Your research reveals that the person assigned to the task has been with the company for years. So performing the required task is not likely to be difficult for this person.

Your research collected the following estimates of duration from the responsible person for the task.

Optimistic 4 hours,Most Likely 8 hours,Pessimistic 16 hours.

Calculate the estimated duration.