Table 1
<B>Node Final X-coordinate</B> <B> (preliminary x-coordinate</B> <B> + modifiers of ancestors)</B>
O 13.5 E 3 + 0 = 3 A 0 + 0 + 0 = 0 D 6 + 0 + 0 = 6 B 0 + 3 + 0 + 0 = 3 C 6 + 3 + 0 + 0 = 9 F 13.5 + 0 = 13.5 N 24 + 0 = 24 G 0 + 21 + 0 = 21 M 6 + 21 + 0 = 27 H 0 + -6 + 21 + 0 = 15 I 6 + -6 + 21 + 0 = 21 J 12 + -6 + 21 + 0 = 27 K 18 + -6 + 21 + 0 = 33 L 24 + -6 + 21 + 0 = 39