Hello tutor, please solve the following in detail to the best of your abilities. Thank you

14. Use the network diagram and the table to answer the following questions: a. What are the expected durations and variances of activities F and H? b. What are the critical activities? . What is the expected project completion time? d. What is the variance of project completion time? e. What is the probability that this project can be complete in fewer than 25 days