Activity	Predecessor	optimistic	Most probable	Pessimistic
A	-	1	4	7
B	A	2	8	4
C	B	3	6	4
D	A	1	2	3
E	CD	2	3	4

What is the expected duration of activity B? Write the answer with 4 decimal places in the box.

What is the expected duration of activity C? Write a number with 4 decimal places in the box

What is the variance of duration of activity B?

What is the variance of duration of activity C?

Draw a complete network diagram based on most probable times on paper (4 Marks), Identify the critical path (1 Mark) and show all the calculations.

Create the network in excel and make sure that the completion time changes based on the duration of activities on the critical path (5 Marks).

Using normal distribution table and your calculated expected durations, what is the probability that you will finish the project before time 27? (5 Marks)