Given the following task time estimates (days)

Task	Time	Predecessor
A	19	--
B	12	--
C	9
D	12	A
E	20	B, C
F	14	D, E
G	28	D
H	15	F
I	18	G, H

a. What is the critical path?

b. What is the project length?

c. How much slack in task B.?

d. How much slack is in task A.?

e. What is the early start / early finish for task F.?

f. What is the late start / late finish for task G.?

g. What if task A increased by 2 days. What would be the project length and the critical path?

Please show work for slack