I am having trouble with them

There are 3 questions attachedto uploaded file.All three are based on the attached chart.

Use the following table to answer question 36-39. Activit Completion y Predecessor time A B C D E F G A A B D, E C, F 5 3 4 6 4 5 6 1) What is the project completion time? A. 22 B. 20 C. 19 D. 17 2) Which activities are on the critical path? A. A, D, F, G B. A, D, E, F C. C, F, A D. D, F, C 3) What is the latest finish time for activity F? A. 12 B. 16 C. 10 D. 9 4) Which activity has the most slack? A. C B. A C. B D. D 5) You have the following results for a given period: Expected completion time of the given project = 44 Variance of project completion time = 5.54 What is the probability of completing the project over 40 days? A. 0.957 B. 0.886 C. 0.896 D. 0.853 1 2