PERT Scenario

Consider a project that consists of 8 tasks with predecessors and task estimates as shown:

Task	Predecessor	Min.	Most Likely	Max.	Expected Time	Variance
A	-	1	2	6	2.5	0.7
B	A	4	7	8	6.7	0.4
C	A	3	4	5	4.0	0.1
D	B, C	7	8	12	8.5	0.7
E	D	4	8	9	7.5	0.7
F	D	3	6	9	6.0	1.0
G	D	2	3	5	3.2	0.3
H	G	5	6	8	6.2	0.3

What is the standard deviation of the critical path (round your answer to one digit after the decimal point)?