A = (-1, 5)
B = (1, 5)
u = Vector(A, B)
C = (2, 5)
D = (5, 5)
v = Vector(C, D)
E = (2, 0)
F = (-1, 2)
w = Vector(E, F)
P = (7, 2)
Q = (9, 4)
z = Vector(P, Q)
R = (12, 4)
S = (9, 1)
a = Vector(R, S)
b = Line(F, E)
c = Line(P, Q)
d = Line(S, R)