A3.. The durations and direct costs for each activity in the network of a small construction contract under both normal and crash conditions are given in the following table. It is assumed the daily indirect cost for performing the activities of the project is $100,000 per day. ACTIVITY PREDECESSOR DURATION (Day) Normal Crash 10. 12 BAO COST (Day) ($'000) Normal Crash 7000 7200 5000 5300 4000 4600 5000 5000 1000 1050 3000 3300 6000 6300 2500 2580 3000 3150 D.GH 10. (a) Use the total duration without crash, draw a precedence diagram (i.e. activity-on-node diagram) and identify the critical path and duration for the above project. (7 marks) (b) Determine the earliest start time (ES), latest start time (LS). earliest finish time (EF), latest finish time (LF) and the total float (TF) without crash for each of the listed activities. (5 marks) (c) Compute the total allowable crash time per activity and the crash cost per week for each activity (3 marks) (d) What will be the minimum possible cost for the project if you want to finish it by 57 days