Chimney Solar Energy Installation (CSEI) is owned by Martha. She is very concerned with the amount...

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Chimney Solar Energy Installation (CSEI) is owned by Martha. She is very concerned with the amount of time it took to complete several recent jobs. Some of her workers are very unreliable with respect to time. A list of activities and their optimistic completion time (a), the most likely completion time (m), and the pessimistic completion time (b) for a new contract are determined. Based on the assumption that the activity times follow a beta distribution, the expected activity time and the standard deviation of each activity are calculated for you and are given in the table below: Activity Immediate Predecessor (s) Expected Standard Time (days) Deviation A None 6 1.2500 BCDEFGH None 3 0.6666 B 5 2.0000 None 4 0.3333 A, D A G D, F C, F 3246 3 0.3333 0.6667 4 0.0000 0.8333 | E 13 6.0000 J B, E 4 0.6667 K G, H 9 5.0000 L H, J 8 2.1667 a) b) e) Construct a network diagram and determine ES, EF, LS, LF and slack for each activity. Determine the expected project completion time and the critical path/s. What is the probability that CSEI will take more than 25 days to complete the project? What is the probability that CSEI will take more than 22 days but less than 27 days to complete the project? If Martha wants to complete the project with a 98.45% assurance, then how many days from the due date should she need to start the project? You can leave your answer in decimals. Chimney Solar Energy Installation (CSEI) is owned by Martha. She is very concerned with the amount of time it took to complete several recent jobs. Some of her workers are very unreliable with respect to time. A list of activities and their optimistic completion time (a), the most likely completion time (m), and the pessimistic completion time (b) for a new contract are determined. Based on the assumption that the activity times follow a beta distribution, the expected activity time and the standard deviation of each activity are calculated for you and are given in the table below: Activity Immediate Predecessor (s) Expected Standard Time (days) Deviation A None 6 1.2500 BCDEFGH None 3 0.6666 B 5 2.0000 None 4 0.3333 A, D A G D, F C, F 3246 3 0.3333 0.6667 4 0.0000 0.8333 | E 13 6.0000 J B, E 4 0.6667 K G, H 9 5.0000 L H, J 8 2.1667 a) b) e) Construct a network diagram and determine ES, EF, LS, LF and slack for each activity. Determine the expected project completion time and the critical path/s. What is the probability that CSEI will take more than 25 days to complete the project? What is the probability that CSEI will take more than 22 days but less than 27 days to complete the project? If Martha wants to complete the project with a 98.45% assurance, then how many days from the due date should she need to start the project? You can leave your answer in decimals.