B Pessimistic Time Estimate Activity Predecessor Most Likely Time Estimate Optimistic Time Estimate 5 Activity 7 10 10 12 9 2 8 4 6 3 1 5 4 2 3 No - 1 4 0 2 3 1 3 3,4 5,6 2 3 1 4. Consider the information that was used in Question 3 and shown below for a project with seven activities and times given in weeks. Develop a model that simulates the completion of the project 10,000 times using Crystal Ball or 500 times with just Excel. Optimistic Most Likely Pessimistic Activity Time Time Time Activity Predecessor Estimate Estimate Estimate 1 5 7 10 2 10 12 3 1 4 6 8 4 2 3 5 9 5 2 3 4 5 6 3,4 1 3 4 7 5,6 1 2 3 a. What is the average project completion time? Enter your answer with two digits to the right of the decimal point Question 18 b. What is the standard deviation of the project completion time? Enter your answer with tw digits to the right of the decimal place. Question 19 c. What is the probability that the project can be completed in 19 weeks or less? Enter your answer as a percentage with two digits to the right of the decimal place. Question 20 5 d. What is the probability that the project will take 20 weeks or longer? Enter your answer as a percentage with two digits to the right of the decimal place