1. A Project has been defined to contain the following list of activities along with their required times for completion and predecessor(s)

Activity	Immediate activity	Time (weeks)	Predecessors
1	Collect requirements	3
2	Analyze processes	2	1
3	Analyze data	2	2
4	design processes	6	2
5	design data	3	3
6	design screens	2	3,4
7	design reports	4	4,5
8	program	5	6,7
9	test and document	7	7
10	install	2	8,9

a) Draw a network diagram

b) Calculate the earliest expected completion time

c) Show the critical path in your network diagram

d) What would happen if activity 6 were revised to take six weeks instead of two weeks?