Given the following project information

Activity	Immediate Predecessor	Optimistic time	Most likely time	Pessimistic time
A	-	2	4	6
B	-	3	4	10
C	B	11	7	5
D	A	14	18	22
E	A	3	5	9
F	C, E	2	3	4
G	D	4	3	5
H	F, G	6	6	6

I) Draw or explain the activities relationship with the immediate predecessors.

II) Calculate the expected time for each activity.

III) Calculate the variance in each activity.