The following information was provided for a project

Immediate

Activity Predecessors

A -

B A

C A

D B, C

E C

F D, E

The number of hours needed to complete each activity as follows.

Activity	Optimistic time	Most Likely Time	Pessimistic Time	EXPECTED TIME	VARIANCE
A	1	2	3
B	1	2	2
C	2	3	4
D	3	5	6
E	4	5	6
F	3	6	7

a. Using the data above, develop a network for this project. (5 marks)

b. Use PERT to identify the expected time and variance for each activity. (5 marks)

c. Determine the early and late times for each activity (5 marks)

d. Determine the critical path and expected completion time of the project (5 marks)