1. Consider the following partially completed PERT table (Question 11 data)

   Activity	Predecessor	Optimistic time	Most likely time	Pessimistic time	Expected time	Variance	EF	LF	Slack	CP
   A	-	1	1.5	5	2	0.444	2	2
   B	A	2	4	5	3.833	0.250	5.833	5.833
   C	A	1	2	3	2	0.111	4	6.83
   D	B,C	3.5	5	6.5	5	0.250	10.83	11.83
   E	B	4	5	12	6	1.778	11.83	11.83
   F	C,D,E	5	9	??	9	1.778	20.83	20.83
   G	E	6.5	7.5	11.5	8	??	19.83	20.83

   The variance of Job G is

   		0.6944
   		0.25
   		0.1111
   		1.777
   		0.4444