Three Dimensional Geometry

Two lines \(\frac{x-3}{1}=\frac{y+1}{3}=\frac{z-6}{-1}\) and \(\frac{x+5}{7}=\frac{y-2}{-6}=\frac{z-3}{4} \quad\) intersect at the point R. Then reflection of \(\mathrm{R}\) in the \(x y\)-plane has co-ordinates