Let S≡(x−2)2+(y−3)2=25 Centre C1(2,3) and radius r1=5 and S′≡x2+y2−
40
25
x−
70
25
y−
160
25
=0 Centre C2(
4
5
,
7
5
) and radius r2=3 If circle S and S′ with centre C1(x1,y1) and C2(x2,y2) and having radius r1 and r2 respectively touches each other internally. Then, coordinate of point of contact is (