Norton industries is installing a new computer system. The activities, the immediate predecessor of each activity, and the activity times of the project are given in the following table.

Activity	immediate predecessor	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 an AON diagram of the project, including activity times.

b) Determine ES, EF, LS, LF, and slack for each activity. Summarize calculations in the form of a table giving the activity schedule.

c) What are the critical activities and what is the project completion time?