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Activities G, P, and R are the immediate predecessors for activity W. If the earliest finish times for the three are 18,15 , and 17 , then the earliest start time for W cannot be determined. is 18. is 15. is 17. Grizzly Corp. has planned a simple project with four tasks. The task information for the project is shown below: Does any task have slack? If so, how much? A) Task C has four days of slack. B) Task B has four days of slack. C) None of the tasks have slack. D) Task D has two days of slack. E) Task C has three days of slack. Grizzly Corp. has planned a simple project with four tasks. The task information for the project is shown below: What is the estimated completion time for the project? A) 19 days B) 23 days C) 18 days D) 16 days Exhibit 3. Consider the following project network and activity times (in weeks): What is the slack time of Activity G ? a) 1 b) 3 c) 0