Multiple-Select: Select all that apply correctly for this problem. A PERT project's total time Te (or ' ) estimate to complete (for the critical path is) 16.0 weeks with a variance of 1.0. The following ' Z ' values apply for completing the project at different intervals. Select 3 correct answer(s) The z value for completing the project in 15 weeks is -1.0 The z value to complete the project in 18 weeks is 2.0 The z value to complete the project in 17 weeks is 1.5 The z value to complete the project in 19 weeks is 3.0