The following represents a project that should be scheduled using CPM:Here is a network with the activity times shown in days:

A diagram shows a critical path through A$,$ B$,$ C$,$ D$,$ E$,$ F and G$.$A diagram shows a critical path through A$,$ B$,$ C$,$ D$,$ E$,$ F and G$.$ It shows circles labeled as A $(7),$ B $(3),$ C $(4),$ D $(5),$ E $(2),$ F $(4)$ and $($G $(5).$ A is connected to B and C$.$ B ad C are connected to D$.$ D leads to F and E$.$ F and E are connected to G$.$

a$.$ Find the critical path.

multiple choice $1$

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

A$-$C$-$D$-$F$-$G Correct

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

A$-$C$-$D$-$E$-$G

The following table shows the normal times and the crash times, along with the associated costs for each activity.

ACTIVITY NORMAL TIME CRASH TIME NORMAL COST CRASH COST

A $76$ $$7,000$ $$8,000$

B $325,0007,000$

C $439,00010,200$

D $543,0004,500$

E $212,0003,000$

F $424,0007,000$

G $545,0008,000$

b$-1.$ If the project is to be shortened by four days, which activities, in order of reduction, would be shortened?

multiple choice $2$

A$,$ C$,$ D $($or F$),$ F $($or D$)$ Correct

A$,$ F$,$ D $($or E$)$

E$,$ A

C$,$ F $($or E$),$ D $($or E$)$

b$-2.$ Find the resulting cost to crash.

the critical path?

multiple choice

A$-$C$-$F$-$H

A$-$D$-$F$-$H

B$-$E$-$G$-$H

A$-$D$-$G$-$H

What is the expected project completion time?

Note: Do not round intermediate calculations. Round your answer to $3$ decimal places.