3. A network consists of the following list. Times are given in weeks. (6 points) Activity A B C D E F G H J K Preceding A A A D C H, E B B, C F, I G, J Duration 6 4 2 6 4 5 6 4 6 7 3 ES EF LS LF Slack a. Determine the ES, EF, LS, LF, and Slack for each activity. Place the answers in the table above. b. Which activities form the critical path? c. How much slack exists at activities D and H? d. What is the duration of the critical path? e. If activity F were delayed by four time units, what would be the impact on the project duration?