Problem: A small software development project has seven major activities with known activity times (in weeks) as follows:

Activity	Immediate Predecessor	Time
A	--	4
B	--	3
C	A	2
D	B	7
E	C, D	4
F	B	5
G	E, F	4

1. Draw the network neatly.
2. Calculate the EF, LF, and slack value for each node.
3. What is the Project Completion Time?
4. Specify the Critical Path and Critical Activities.