Consider following table:

PRET. ACT 
TIME ESTIMATES (days) 
Activity 

t_{o} 
_{ }t_{ml } 
t_{p} 
_{ }t_{e} 
A 
 
6 
6 
6 

B 
A 
4 
5 
6 

C 
A 
2 
4 
6 

D 
B 
4 
6 
8 

E 
C 
1 
3 
5 

F 
D 
1 
5 
3 

1. Find out the completion time and standard deviation (σ) for project roundoff the standard deviation to the nearest hundredth: two decimal places.
2. Find out the completion time at 95% confidence level?