eq1: (x - 1)^(2) + (y - 1)^(2) + (z - 1)^(2) = 7
eq2: (x - 2)^(2) + (y - 3)^(2) + (z - 3)^(2) = 1
A: (1, 1, 1)
B: (2, 3, 3)
f = Line(A, B)
c = IntersectConic(eq1, eq2)
C = Point(c)
k = 1 (slider from -1 to 3)
P: ((1 - k) * A) + (k * B)
a = Sphere(P, C)