Question 1: A project consist of the following activities the duration and relationships between activities are given in table. a- Draw the network diagram. b- Determine critical path C- Determine cost of the project after crashed at 66 day Crashed time 7 4 6 Activity 1-2 1-3 1-4 2-5 3-6 4-7 5-8 8-10 7-9 9-10 6-9 10-11 Normal time 10 5 8 23 17 20 30 5 14 10 5 14 19 13 16 25 5 10 10 5 10 Normal cost 1500 1000 1200 2500 1500 1600 4000 9000 500 500 500 500 Crashed cost 1950 1100 1600 2700 1700 1880 4500 9000 780 500 500 780