this is from Project management subject please write in typing

12. Draw a network diagram that represents the following IS development task list. Activity Immediate Predecessor 1. Problem Definition 2. Study Current System 1 3. Define User Requirements 1 4. Logical System Design 3 5. Physical System Design 2 6. System Development 4, 5 7. System Testing 6 8. Convert Database 4,5 9. System Conversion 7,8 14. Calculate the ES, EF, LS, and LF times and the slack for each activity in the figure below, and identify the critical path for the project. Can the project be completed in 30 weeks? Assume that "Systems Analysis" actually finished at 8 weeks, Design Input & Output" actually finished at 15 weeks, and Design Database actually finished at 19 weeks. Recalculate the expected project completion time. Which activities would you focus on in order to get the project back on schedule? Develop Input Screens 51 8 Design Input & Output 3 3 Problem Definition System Analysis Test System Implement System Develop Output Reports 6 10 2 00 6 9 5 Design Database Develop Database 4 15 7 2 15. Calculate the ES, EF, LS, and LF times and the slack for each activity in the figure below, and identify the critical path for the project. Can the project be completed in 30 weeks? Assume that activity A actually finished at 5 weeks and activity B actually finished at 5 weeks. Recalculate the expected project completion time. Which activities would you focus on in order to get the project back on schedule? Activity C 3 18 Activity H 8 2 Activity A 1 3 Activity) 10 5 Activity E 5 10 Activity G 71 8 Activity Activity B 25 9 9 Activity D 4 7 Activity F 6 5