A small sample of your project's PERT calculations is shown here. Activity 2 is particularly important to the project, and your stakeholders are asking for a confidence level for this activity. You tell them there is a 95.44 percent chance of completing activity 2 within how many days?

Activity	Optimistic	Pessimistic	Likely Expected Value
1	10	14	12
2	20	30	23
3	3	3	3

a.

Between 21 and 25 days

b.

Between 13 and 33 days

c.

Between 18 and 28 days

d.

Between 23 and 28 days