Given the following task time estimates (HOURS),

Task	Time	Predecessor
A	40
B	20
C	25	A
D	19	A, B
E	25	C, D
F	24	E
G	18	F

a. How long is the project length?

b. What tasks form the critical path?

c. What is the LS/LF for activity D.?

d. How much slack is there in activity C?

How much slack in activity D?

e. What if activity D. was delayed by 6 hours, what would be the project length and critical path?

f. Referring to letter e., how much slack would be in activity B.?

*Please show work in excel (formulas)