A: (1, 2, 9)
B: (1, 3, -2)
C: (1, 4, 3)
D: (1, 3, 0)
E: (1, 0, 0)
f = Segment(D, E)
F = Point(yAxis)
g = Segment(D, F)
h = Segment(B, D)
G: (1, 4, 0)
i = Segment(G, D)
j = Segment(G, C)
H = Point(zAxis)
k = Segment(C, H)
I: (0, 4, 0)
l = Segment(I, G)
J: (1, 2, 0)
K: (0, 2, 0)
m = Segment(J, K)
n = Segment(J, A)
L: (0, 0, 9)
p = Segment(L, A)
a: x = 1