3. Using the Information given below in Tables 3 and 4 about the project network, compress 1week per move using the least cost method. Reduce the schedule until you reach the crash point of the network. For each move, clearly write what activity (s) was crashed and the adjusted total cost. Under normal circumstances, the project is completed in 21 weeks. Total weekly indirect costs are presented in Table 3. What is the optimum cost-time schedule for the project? What is the cost? [15] Table 3 Activity Predecessors Normal time Crash time Normal cost Crash cost A None 4 4 50 50 B A 5 2 70 190 C A 5 4 80 120 D C 4 2 40 120 E C 5 3 60 140 F B 5 4 50 90 G D, F 4 3 70 100 H D, E 4 3 80 110 I G, H 3 3 50 50 Table 4 Week No 21 20 19 18 17 16 15 14 Indirect 800 710 620 530 440 350 260 170 cost (dollar value)