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

Activity	Activity Time (weeks)	Immediate Predecessor(s)
A	5	-
B	8	-
C	5	A
D	12	B,C
E	11	B
F	4	D
G	4	E
H	7	F, G

Choose the correct network diagram and calculate the slack for each activity. Which activities are on the critical path?

Activity	Activity Time (weeks)	On Critical Path?	Slack (weeks)
A	5	Y/N?	?
B	8	Y/N?	?
C	5	Y/N?	?
D	12	Y/N?	?
E	11	Y/N?	?
F	4	Y/N?	?
G	4	Y/N?	?
H	7	Y/N?	?