4. Consider the following project network and activity times (in days): on E ject mplet Start Finish 25 G The crashing data for this project are as follows: Time (days) Cost ($). Activity Normal Crash Normal Crash A 3 2 800 1400 B 2 1200 1900 C 5 3 2000 2800 D 5 3 1500 2300 E 6 4 1800 2800 F 2 1 600 1000 G 2 1 500 1000 a. Find the critical path and the expected project completion time. B D E, 13 days b. What is the total project cost using the normal times? RMB , 2100 c. I we wish to complete the project in 12 days. What is the critical path? What is the total project cost in 12 days? D by 2 days 1 ) D by 2 days C by I day E by 1day F by 1 day RM 2, 100