Draw an Activity-On-Arrow network diagram for following project.
|
Activity
|
Immediate Predecessor
|
Expected activity time (days)
|
Activity time variance (days)^2
|
|
a
|
-
|
10
|
25
|
|
b
|
e, h
|
15
|
30
|
|
c
|
g, j
|
9
|
35
|
|
d
|
b
|
12
|
40
|
|
e
|
a
|
8
|
50
|
|
f
|
-
|
7
|
40
|
|
g
|
i
|
20
|
80
|
|
h
|
f
|
15
|
30
|
|
i
|
-
|
5
|
40
|
|
j
|
f
|
10
|
20
|
|
k
|
i
|
10
|
0
|
|
l
|
g, j, m
|
28
|
24
|
|
m
|
k
|
7
|
30
|
|
n
|
c
|
10
|
50
|
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