Please answer the three questions

1. During the planning phase of a project, the critical path activities were identified and data is shown below. All other paths through the project have a slack of 4 weeks or more. Activity Predecessor Normal Time |Normal Cost| Crashed Duration Crashed Cost 24 10 weeks $66,000 8 weeks $74,000 31 24 5 weeks $122,000 3 weeks $136,000 44 31 6 weeks $60,000 4 weeks $75,000 What is the lowest extra cost amount to reduce the project duration by 3 weeks? 2. The activities below have been scheduled using the network scheduling method of the textbook. The duration and staff assigned are shown. What is the staff count during period 10 based on the schedule and staff assigned? Task Duration Staff Count ES EF Task | Duration Staff Count ES EF B 5 4 5 10 E 6 7 11 17 C 4 5 6 10 F 6 2 12 18 D 5 8 10 15 G 9 4 14 23 3. A project has planned slack of 2 days. The three activities of the project must be completed in order presented. The data on each is below. Task Duration Predecessor One 6 Two 11 One Three | 6 Two Task One had an actual duration of 11 and it is predicted task Two will have a duration of 10. What is the new project slack if task Three is expected to be completed as planned? Note a numerical answer is required