I need the calculation and mathemathical steps for the following question: B

$.$

$$Minimum Cost Schedule

$($

$2$

$5$

$$points

$)$

$.$

$$Information concerning a project is given in the table below.

Activity Normal Time

$($

days

$)$

$$Normal Cost

$($

$

$)$

$$Crash Time

$($

days

$)$

$$Crash Cost

$($

$

$)$

$$Immediate Predecessor

$($

s

$)$

A

$5$

$1$

$0$

$0$

$0$

$4$

$1$

$2$

$0$

$0$

$-$

B

$5$

$8$

$0$

$0$

$3$

$2$

$0$

$0$

$0$

$-$

C

$2$

$6$

$0$

$0$

$1$

$9$

$0$

$0$

$$A

$,$

$$B

D

$3$

$1$

$5$

$0$

$0$

$2$

$2$

$0$

$0$

$0$

$$B

E

$5$

$9$

$0$

$0$

$3$

$1$

$2$

$0$

$0$

$$C

$,$

$$D

F

$2$

$1$

$3$

$0$

$0$

$1$

$1$

$4$

$0$

$0$

$$E

G

$3$

$9$

$0$

$0$

$3$

$9$

$0$

$0$

$$E

H

$5$

$5$

$0$

$0$

$3$

$9$

$0$

$0$

$$G

Indirect project costs amount to $

$2$

$5$

$0$

$$per day. The company will incur a $

$1$

$0$

$0$

$$per day penalty for each day the project lasts beyond day

$1$

$4$

$.$

a

$.$

$$What is the project

$$

s duration if only normal times are used?

b

$.$

$$What is the minimum

$-$

cost schedule?

c

$.$

$$What is the critical path for the minimum

$-$

cost schedule?