Suppose that lead$-$time demand is normally distributed with a mean of $250$ units and a standard deviation of $50$ units. If a firm wants to maintain a $95\%$ service level, what should the reorder point be$?$Consider the project with the following estimates for activity times and precedence relationships:

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

What is the critical path?