I need help for number 12, please. Based on question number 11, which I already know the answer, find number 12. First image is the answer for number 11. 11. Building a backyard swimming pool consists of nine major activities. The activities and their immediate predecessors are shown. Develop the project network. For number 12, see the second image 12. Assume that the activity time estimates (in days) for the swimming pool construction project in Problem 11 are as follows:  a. What are the critical activities?  b. What is the expected time to complete the project?  c. Based only on the critical path, what is the estimated probability that the project can be completed in 25 or fewer days?

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Charlie Cook was able to determine the activity times for constructing his chemical contaminant tracking machine. Cook would like to determine ES, EF, LS, LF, and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times: Q Activity Time (weeks) Immediate Predecessor(s) Activity Time (weeks) Immediate Predecessor(s) A B C D 7 8 2 1 Charlie's earliest start (ES) and earliest finish (EF) are: A A Activity A EFGH ES EF 7 5 7 11 8 B B C, E D, F

In your innovative project, you are requested to produce a documentary film about the training experience of the property development team. The table 1 below shows the following activities: After the script has been approved and the location confirmed (activity A), filming of the documentary can begin; there are six scenes to be filmed (activities B through G) and, due to the nature of the documentary, there are several dependencies that determine when each activity can be completed. Once the final scene has been filmed, the documentary can be cut and edited before presenting it to the customers for review. The project begins at time 0. This means that the activity A starts with 0 and has an estimated duration of 2 days; see further details in Table 1 below. Table 1 Activity Description Estimated duration Immediate in days Predecessor(s) A Develop and obtain approval for the script В Film scene 1 A Film scene 2 1 A D Film scene 3 2 B E Film scene 4 4 В Film scene 5 2 B; C G Film scene…