Consider following table:

PRET. ACT 
TIME ESTIMATES ;(days) 
Activity 

t_{o} 
_{ }t_{ml } 
t_{p} 
_{ }t_{e} 
A 
 
2 
3 
4 

B 
 
2 
4 
6 

C 
 
2 
4 
6 

D 
A 
3 
4 
5 

E 
B 
2 
5 
8 

F 
C 
2 
4 
6 

G 
D,E,F 
1 
2 
3 

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