S_1 = (7.5, 0.78)
T = (7.86, -1.88)
k_1 = Circle(S_1, T)
p = Tangent(T, k_1)
A = Point(k_1)
D = (10.95134260737996, 3.5752923833996193)
a = 0 (slider from 0 to 5, step 1)
C = Mirror(S_1, T)
f = Line(C, p)
c = Parabola(S_1, f)
g = Line(S_1, A)
S_2 = Intersect(c, g, 2)
k_2 = Circle(S_2, A)