A = (-2, 1)
B = (3, 3)
s = Segment(A, B)
C = (-2, 3)
D = (3, 5)
t = Segment(C, D)
v = Vector(C, D)
P: C + 7.0 / 10.0 * v
T: A + 7.0 / 10.0 * (B - A)