CASE #$3$

Using the table above please indicate:

a$)$ The expected duration for the activities #$1$ & #$5($using PERT

estimation$)$

b$)$ Which activities the project start with?

c$)$ Using duration of $3$ for activity #$9$ and suppose that the total duration

of the project is $50.$ What is the Latest Time to finish and to start for

the direct preceding activities of activity #$9?$