A project for improving a billing process has the following precedence relationships and activity times:

Activity Activity Time (weeks) Immediate Predecessor(s) A 4 - B 12 - C 5 A D 11 B, C E 10 B F 4 D G 7 E H 9 F, G

b. Calculate the slack for each activity. Which activities are on the critical path?

Activity	Activity Time (weeks)	On critical path?	Slack (weeks)
A	44	No Yes	nothing
B	1212	Yes No	nothing
C	55	No Yes	nothing
D	1111	No Yes	nothing
E	1010	Yes No	nothing
F	44	Yes No	nothing
G	77	Yes No	nothing
H	99	Yes No	nothing