3. Given point $P(4,5)$, two lines $i_{1}: x=3, l_{2}: x=13$. Then the equation of the circle passing through $P$ and tangent to $i_{1}, l_{2}$ is $\qquad$
$\begin{array}{l}\text { 3. }(x-8)^{2}+(y-5)^{2}=25 \text { or }(x-8)^{2}+(y+1)^{2} \\ =25\end{array}$