Activity Predecessor(s) A B D E F G H 1 J A B E&F D G&H Time in Weeks a m b 5 6 7 1 3 5 1 4 7 1 2 3 1 2 9 1 5 9 2 2 8 4 4 10 2 5 8 2 2 8 Use PERT technique to answer the following questions. 1. Construct the project network 2. Find the expected duration and variance of each activity. 3. Find the critical path, the expected project duration, and project standard deviation 4. What is the probability of completing on or before 22 weeks? 5. What is the probability of completing the project between 13 weeks and 15 weeks? 6. What is the probability of not completing the project between 13 weeks and 15 weeks