A small project is composed of 7 activities whose time estimates are listed below. Activities are being identified by their beginning (i) and ending (j) node numbers. 1. Draw the network 2. Calculate the expected variances for each 3. Find the expected project completed time 4. Calculate the probability that the project will be completed at least 3 weeks than expected 5. If the project due date is 18 weeks, what is the probability of not meeting the due date