A software development project is based on the following:

Activity Predecessor Successor Normal

Time Normal

Cost Crash

Time Crash

Cost

A $$ C $8$ $ $2007$ $ $300$

B $$ D $103006400$

C A E $280011000$

D B E $42002300$

E C$,$ D $1550011800$

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

b$.$ What is the critical path?

multiple choice $1$

C$-$E

A$-$C$-$E

D$-$E

B$-$D$-$E

c$.$ Teams of software engineers working on activities A and B agree to combine their efforts and to label their new activity as $$F$.$ They believe that, by working together, they can complete their combined work in nine periods. What is the new normal project completion time and the new critical path?

multiple choice $2$

F$-$D$-$E

C$-$E

F$-$C$-$E

D$-$E