Project Scheduling with Uncertain Time: Activity Immediate Time (weeks) Most predecessor Optimistic Probable Pessimistic U B.D HF Solve the problem and enter your answers to the questions 1. What are the critical path activities? 2. What is the expected completion time for the project (Hof weeks)? 3. What are the variance and standard deviation for the critical path? 4. What is the probability that the project can be completed within 21 weeks? Be sure to enter your answers as follow. For (1): show the sequence of critical path activities letters. For (2): show the answer is # of weeks. For (3): must show the variance of the critical path, standard deviation For (4): show the probability of completing the project within 21 weeks. Once you find the z.score value, you need to reference Appendix B to determine the probability, P(T