6. A project manager has developed the following data on a project tasks and durations by weeks.
   1. Please create an AON diagram, identify the critical path and the expected project duration.
   2. What is the chance of completing the project one week earlier than expected?
   3. The customer has asked for a 99% confidence on the project completion date. Calculate the number of additional weeks the project manager needs to make that commitment.

		Time estimation in weeks
Task	Predecessor	optimistic	Most likely	Pessimistic
A		3	4	5
B	A	1	8	15
C	A	2	4	6
D	A	4	8	12
E	B	7	9	11
F	C,B	2	5	8
G	E,D	6	8	10
H	F,G	4	7	10