A ray of light comes along the line L=0 and strikes the plane mirror kept along the plane P=0 at B. A(2,1,6) is a point on the line L=0 whose image about P=0 is A′. It is given that L=0 is x−23=y−14=z−65 and P=0 is x+y−2z=3.
The coordinates of A′ are