could you guys please help me, this is one problem that has multiple parts, please show steps I'm having a really hard time understanding and thank you..

MIC TOHOwing to answer questions 7-14 (35 points) Activity Events (nodes) Times Start Finist Optimistic Most likely Pessimistic 1 2 9 15 27 B 1 3 13 29 24 6 9 12 D 2 5 23 35 35 - 3 5 19 26 51 F 4 6 23 29 35 G 5 6 44 20 20 H 6 7 2 5 I 21 CO OUI 7. What are the estimated mean times for Activities A-H? 8. What are the estimated standard deviations in the times for Activities A-H? 9. What is the estimated mean time for project completion? 10. What are the estimated slack times for activities A-H? 11. What is the critical path for this project network? 12. What is the estimated standard deviation for the CRITICAL PATH completion time? 13. What is the probability that the critical path for this project will be completed within 75 days? 80 days? 85 days? 90 days? 14. Within what amount of time is there a 90% probability that the critical path for this project will be completed? 95% 99%