Task time estimates for the modification of an assembly line at Jim$$ Goodale's Carbondale,$$ Illinois, factory are as$$ follows:

Activity

Time

$($in hours$)$

Immediate$$ Predecessor$($s$)$

A

$6\mathrm{.}0$

long dash

B

$7\mathrm{.}5$

long dash

C

$4\mathrm{.}0$

A

D

$7\mathrm{.}0$

$$B$,$ C

E

$4\mathrm{.}5$

$$B$,$ C

F

$8\mathrm{.}4$

D

G

$4\mathrm{.}0$

$$E$,$ F

This exercise contains only part a$.$

Part $2$

$$a$)$ The correct precedence diagram for the project is shown in

$$

Figure $1$

Figure $2$

Figure $3$

$.$

$.$

$.$

$.$

Question content area right

Part $1$

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In the diagram, there are $7$ circles labeled using the letters from A to G$.$ There are arrows, connecting one circle to another in the following manner: A to C$,$ B to D and E$,$ C to D and E$,$ D to G$,$ E to F$,$ and F to G$.$ The diagram is labeled Figure $1.$

font size increased by $4$ Upper Afont size increased by $4$ Upper Cfont size increased by $4$ Upper Gfont size increased by $4$ Upper Bfont size increased by $4$ Upper Ffont size increased by $4$ Upper Dfont size increased by $4$ Upper Efont size increased by $4$ Figure $2$

In the diagram, there are $7$ circles labeled using the letters from A to G$.$ There are arrows, connecting one circle to another in the following manner: A to C$,$ B to D and F$,$ C to D and F$,$ D to E$,$ E to G$,$ and F to G$.$ The diagram is labeled Figure $2.$

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