Use the following data for problems 5 and 6. Assume all the activities are on the critical path.

Activity	Optimistic Time	Most Likely Time	Pessimistic Time
A	2	8	12
B	1	5	20
C	12	14	16
D	8	25	27

5. The expected time for activity D is?

1. 6.83
2. 22.5
3. 18.2
4. 6.17

6. What is the variance for activity B?

1. 8.12
2. 3.02
3. 10.03
4. 2.78