Activity	Dependency	Optimistic	Most likely	Pessimistic
A	-	5	6	8
B	-	3	4	5
C	A	2	3	4
D	B	x-1	x = (last digit of your roll no. +4)	x+2
E	B	1	3	4
F	-	8	10	15
G	E,F	2	3	4
H	C,D	2	2	2.5

1. By using three estimates for each activity, find:
   1. Estimated time 't_e'
   2. Activity standard deviation s
2. Draw PERT network after calculating the events estimated times and standard deviations.

Please, answer it as soon as you can!! I'll give you thumb ups for sure!