Q.1 A small project is composed of 7 activities whose time estimates are listed in the table below: 1-2 1 5-6 3 6 15 4-6 2 3-5 2 5 2-5 1 1-4 2 1-3 1 Optimistic Time (Weeks) Most Likely Time (Weeks) Pessimistic Time (Weeks) 1 7 4 7 2 8 1 1 5 14 8 (a) Draw the project network. (b) Find the expected duration and variance of each activity.