Problem 4-8 The following represents a project that should be scheduled using CPM: Use Appendix G .

b. The critical path is A D F H

c. The Expected project time is 20.166 days

d. I cannot figure out (d) can you help me with this one?

Thank you!

z T TE 2 T = 22daysT E= 20daysA D F H = 7 + 11+7+ 6Q^2 = 31Z=22-20 / square root of 31Z= 0.35921Assuming the normal distribution applies (which is questionable for a sample of three…