A contractor has developed the tasks, durations, and predecessor relationships in the following table for part of a new building. The Beta distribution is assumed for all activity times. 7. Draw the precedence network for the project. You may use the shape tools in Word or PowerPoint, or the drawing application of your choice, and insert (copy \& paste) the diagram into the Word file. What are the ES/EF (earliest start/finish) and the LS/LF (latest start/finish) for each task based on the expected task times? Write these times on the network diagram. Hint: It may be helpful to create dummy start and/or end tasks with task times of 0 to "tie" the ends of the network together. (10 pts) 8. What is the critical path based on the expected task times? (2 pts) 9. What is the probability of completion of the project before week 22 using the critical path based on the expected task times? (2 pts) 10. What is the probability of completion of the project before week 26 using the critical path based on the expected task times? (4 pts)