A small software development project has eight major activities. The times are estimated and provided in the table $1-2$ below. All times are in weeks. Answer Question # $6$ to $10$:

Activity

Optimistic

Time

Most

Likely Time

Pessimistic

Time

Immediate

Predecessor$($s$)$

A

$3$

$4$

$5$

$--$

B

$5$

$7$

$9$

$--$

C

$2$

$3$

$10$

A

D

$2$

$5$

$8$

B

E

$1$

$7$

$7$

B

F

$3$

$5$

$7$

C$,$ D

G

$7$

$8$

$9$

D$,$ E

H

$2$

$6$

$10$

F