a)
Figura 3.23
A
~
1
3
le
1'0
14.
I
I I
I
I
I
F
G
2F
H
G
1
G
4F
I
I
I I
I
I I
I
I
I
I
I
2H
K
2H
K
2H
K
F
G
I
I
I
2H
K
b)
Tabla 3 27
-----
:::
~
o
,
=
ji
~
==
,
176
1...,174,175,176,177,178,179,180,181,182,183 185,186,187,188,189,190,191,192,193,194,...270