likely, b$=$ pessimistic times$).$ Assume that the activity times are independent:

Time

Activity

Immediate predecessor$($s$)$

a

m

b

A

$-$

$11$

$15$

$19$

B

$-$

$27$

$31$

$41$

C

$-$

$18$

$18$

$18$

D

A$,$B

$9$

$10$

$11$

E

C

$5$

$8$

$11$

F

D$,$E

$16$

$19$

$22$

a$)$ Determine the total expected project completion time.

b$)$ What is the critical path of the project?

Select one:

a$)59$ weeks; b$)$ A$-$D$-$F

a$)61$ weeks; b$)$ B$-$D$-$F

a$)61$ weeks; b$)$ A$-$B$-$D$-$F

a$)42$ weeks; b$)$ C$-$E$-$F