a OB b 10 Activity Predecessor 1 2 3 4 1 5 2 6 3 7 3 8 1, 5, 6 9 1, 5, 6 10 4 11 7, 8, 9 6 3 1 2 2 3 2 3 2 1 1 m 8 6 3 4 3 4 2 7 4 4 10 9 5 12 4 5 2 11 6 7 13 1. Calculate the mean completion time and variance for each activity. Put them in a table and paste the table into a word document. 2. Draw the project network, showing earliest start and finish times, and latest start and finish times. Be neat if you do it manually. If your graph is not neat, I will deduct points. ! strongly recommend doing it manually because that is how you will have to do it in exams. 3. What is the expected project completion time? 4. What is the critical path for this project? 5. What is the variance for project duration? 6. What is the probability that the project will be completed within 30 weeks