$55$

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Time Remaining $4$ hours $3$ minutes $55$ seconds$04$:$03$:$55$

Problem $13-7($LO $13-6)$ Construction of a building is$...$

Construction of a building is based on the following CPM network:

Activity Predecessor Successor Normal

Time Normal

Cost Crash

Time Crash

Cost

A $$ B$,$ C$,$ D $6$ $ $1002$ $ $150$

B A E $8802140$

C B$,$ A F $240160$

D A F$,$ G $3802120$

E B G $5803140$

F C$,$ D G $5601100$

G E$,$ F$,$ D $61202160$

Draw the network and answer the following questions.

a$.$ What are the normal project completion time and normal cost?

b$.$ Identify the critical path. $($You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.$)$

multiple choice

A$-$D$-$F$-$G

A$-$B$-$E$-$G

A$-$B$-$C$-$F$-$G

A$-$D$-$G

A$-$C$-$F$-$G

c$.$ How much additional cost is needed to crash the project by one day?

This can be accomplished most effectively by crashing any one of which three activities below? $($You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer.$)$

check all that apply

Aunanswered

Bunanswered

Cunanswered

Dunanswered

Eunanswered

Funanswered

Gunanswered

d$.$ What is the minimum time for project completion?