Activity

Predecessor

Optimistic $($minimum$)$

Most likely

Pessimistic $($maximum$)$

A

$-$

$1$

$2$

$4$

B

$-$

$5$

$6$

$7$

C

$-$

$2$

$4$

$5$

D

A

$1$

$3$

$4$

E

C

$4$

$5$

$7$

F

A

$3$

$4$

$5$

G

B$,$D$,$E

$1$

$2$

$3$

The expected duration of activity C in weeks is