Operation questions: Given the following network with activities and times estimated in days,Activity Optimistic Most Probable Pessimistic Note 1: Show all your calculations. Answers without supporting calculations will receive 0 (zero) points.Note 2: Round all numbers to two places after the decimal.a ( 10 p.) What are the critical path activities?b ( 5 p.) What is the expected time to complete the project?c. ( 5 p.) What is the project variance?d (10 p.) What is the probability the project will take no more than 28 days to complete?e (15 p.) Suppose the management requests that activities be shortened to provide an at least 99% chance of meeting the 28 -day completion time?If the project variance is the same as you found in (c), how much should the expected project completion time be shortened to achieve the abovegoal?f ( 5 p.) Which activities would you consider shortening first to achieve the above goal? Explain why?
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