Draw a network diagram for this problem, Applied Statistics

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The project of building a backyard swimming pool consists of eight major activities and has to be completed within 19 weeks. The activities and related data are given in the following table:

Activity	Immediate predecessor	Activity time (weeks)
A	-	3
B	-	6
C	A	2
D	B,C	5
E	D	4
F	E	3
G	B,C	9
H	F,G	3

a. Draw a network diagram for this problem.

b. Determine the critical path and the expected project completion time.

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