If the lengths of tangents drawn to the circles :$x^2+y^2-8x+40=0; 5x^2+5y^2-25x+80=0;x^2+y^2-8x+16y+160=0$ from the point P are equal, then P=

Question

$$\begin {array} {1 1} (1)\;\bigg(8,\frac{15}{2}\bigg) & \quad (2)\;\bigg(-8, \frac{15}{2}\bigg) \\ (3)\;\bigg(8,\frac{-15}{2}\bigg) & \quad (4)\;\bigg(-8,\frac{-15}{2}\bigg) \end {array}$$