12-28 A project manager discovers that his team has neglected to complete the network diagram for the project. The network diagram is shown in Figure P12-28. However, the project manager has some information available, specifically that each activity, labeled A-G, has a different duration between one and seven weeks. Also, the slack time for each of the activities is known as shown below. Duration (weeks): 1, 2, 3, 4, 5, 6, 7 Slack time (weeks): 0, 0, 0, 1, 1, 3, 7 Clues 1. Activity E is the longest duration activity and is on the critical path, which is the D unlucky number 13; also, there is only one critical path. 2. The early finish (EF) time for activity F is eleven weeks. 3. The latest start (LS) time for activity D is nine weeks. 4. If activity A slips by one week, it will be on a critical path. Activity Duration Early Start Early Finish Latest Start Latest Finish A B E G START FINISH B C D E 1III1 1111 1III 1III Figure P12-28 F Using the clues provided below, determine the duration of each activity as well as G the early start, early finish, latest start, and latest finish times for each activity