$.$ Which activities have slack, and how much?

multiple choice $2$

D$,1$ week; E$,2$ weeks.

C$,1$ week; E$,2$ weeks.

B$,2$ weeks; E$,2$ weeks.

C$,2$ weeks; F$,3$ weeks.

Here is a table of normal and crash times and costs.

ACTIVITY NORMAL TIME CRASH TIME NORMAL COST CRASH COST

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

B $215,0007,000$

C $439,00010,200$

D $543,0004,500$

E $212,0003,000$

F $424,0007,000$

G $545,0008,000$

d$-1.$ Which activities would you shorten to cut two weeks from the schedule in a rational fashion?

multiple choice $3$

A$,$ C

B$,$ C

B$,$ D

A$,$ E

d$-2.$ What would be the total incremental cost?