9. Draw a network diagram representing the following logic as the project starts, activities A and B can be performed concurrently. When activity A is finished, activities C and D can start. When activity B is finished, activities E and F can start. When activities D and E are finished, activity G can start. The project is complete when activities C, F, and G are finished. Use both the activity-in-the-box and the activity-on-the-arrow formats. 10. Draw a network diagram representing the following information: the project starts with three activities, A, B, and C, which can be done concurrently. When A is finished, D can start, when B is finished, F can start, when B and D are finished, E can start. The project is complete when C, E, and F are finished. Use both the activity-in-the-box and the activity-on-the-arrow formats. 11. Draw a network diagram that represents the following IS development task list. Use both the activity-in-the-box and the activity-on-the-arrow formats. Activity Immediate predecessor 1. Problem Definition 2. Study Current System 3. Define User Requirements 4. Logical System Design 5. Physical System Design 6. System Development 7. System Testing 8. Convert Database 4, 5 4, 5 7, 8 9. System Conversion 12. Find as many errors as you can in the following network diagram: >> 7