A small office building construction project requires completion of the tasks shown in this table:

The corresponding CPM-AoN data file is as follows.

A 2
B 16 A
C 9 B
D 8 B
E 10 C
F 6 D E
G 2 D
H 2 F
I 9 D F
J 5 D
K 3 F
L 2 I
M 1 G
N 7 B
O 4 D N
P 3 H K N
Q 9 L
R 1 Q
Z 0 J M O P R