Consider the following project activities.

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Part $2$

a$.$ Choose the correct project network diagram below.

A$.$

A

B

C

D

E

F

G

x y graph

B$.$

A

B

C

D

E

F

G

x y graph

Your answer is correct.C$.$

A

B

C

D

E

F

G

x y graph

D$.$

A

B

C

D

E

F

G

x y graph

Part $3$

b$.$ Identify all the paths through the network and their lengths. Fill in the table below $($enter your responses rounded to one decimal$$ place$).$

Part $4$Part $5$Part $6$Part $7$

Path

Length$($days$)$

$$A$-$C$-$

E$-$G

$$

$18$

$$A$-$

D

$-$E$-$G

$$

$23\mathrm{.}5$

$$A$-$

D$-$F

$-$G

$$

$19\mathrm{.}5$

B$-$D

$-$E$-$G

$$

$25\mathrm{.}5$

$$B$-$

D$-$F

$-$G

$$

$21\mathrm{.}5$

Part $8$

c$.$ The critical activities are

B$,$ D$,$ E$,$ and G

so they make up the critical path.

Part $9$

The entire project will take

$$

$25\mathrm{.}5$ days to complete. $($Enter your response rounded to one decimal place.$)$

Part $10$

d$.$ Management would like to complete the project in less than $23$ days. Management has determined that activity Upper E can be crashed $4\mathrm{.}5$days$,$ for a total cost of $$$$7$ comma $500.$ No other activities can be crashed.

After$$ crashing,

B$,$ D$,$ E$,$ and G

is the critical path. The entire project will take

$$

$21$ days. $($Enter your response rounded to one decimal$$ place.$)$