Consider the following work breakdown structure:

activity	Start node	Finish Node	Optimistic	Most likely	Pessimistic
A	1	2	9	15	21
B	1	3	13	21	23
C	2	4	6	9	18
D	2	5	23	35	47
E	3	5	19	26	27
F	4	6	23	29	41
G	5	6	14	20	26
H	6	7	2	5	8

What are the estimated slack times (in weeks) for activities A-H?

		1; 5; 0; 3; 10; 0; 0; 3; 2
		10; 0; 1; 5; 0; 5; 0; 10
		5; 1; 5; 0; 15; 5; 3; 0
		0; 5; 15; 0; 5; 15; 0; 0