Question 4

The following estimates in terms of working days were prepared for a new project:

Activity	Preceding Activity	Most optimistic time (days)	Most probable time (days)	Most pessimistic time (days)
A B C D E	- - - A B, D	4 3 6 3 2	6 6 8 4 3	8 9 16 5 4

REQUIRED:		MARKS
4.1	Calculate the expected duration of each of the above activities	5
4.2	Prepare a network diagram and indicate the critical path.	5
Total		10