Time estimates $($in weeks$)$

Activity

Immediate predecessor

Optimistic

Most likely

Pessimistic

A

$-$

$4$

$8$

$10$

B

A

$2$

$8$

$24$

C

A

$8$

$12$

$16$

D

A

$4$

$6$

$10$

E

B

$1$

$2$

$3$

F

E$,$C

$6$

$8$

$20$

G

E$,$C

$2$

$3$

$4$

H

F

$2$

$2$

$2$

I

F

$6$

$6$

$6$

J

D$,$G$,$H

$4$

$6$

$12$

K

I,J

$2$

$2$

$3$