A small project is composed of 7 activities whose time estimates are listed in the table below. Activities are identified by their beginning (i) and ending (j) node Numbers. Activity (i,j) Estimated Duration (in weeks) Optimistic Most likely Pessimistic 1-2 1 1 7 1-3 1 4 7 1-4 4 3 8 2-5 1 1 1 3-5 2 5 14 4-6 2 5 8 5-6 3 6 15 Required: A. Draw the project network. (3 points) B. Find the expected duration for each activity. (2 points