PS

$.$

$7$

$4$

$$Bell computer is planning to launch a new high

$-$

end server. Nine steps or tasks are required to assemble this computer. Daily demand is expected to be

$8$

$5$

$$units and there are three

$8$

$-$

hour shifts available each day to meet this production quota.

Task Req'd Time

$($

in minutes

$)$

$$ Predecessor

A

$1$

$1$

$$None

B

$1$

$3$

$$A

C

$6$

$$B

D

$4$

$$B

E

$1$

$6$

$$A

F

$3$

$$C

$,$

$$D

G

$9$

$$F

H

$1$

$4$

$$E

I

$4$

$$G

$,$

$$H