A horizontal plane mirror coincides with the xy-plane. A light ray travelling in air has direction vector vi=(−3,4,−12) (components along x, y, z axes respectively) and strikes the mirror. Which of the following vectors could correctly represent the direction of the REFLECTED ray?
a) (3,4,12)
b) (−3,4,12)
c) (−3,4,0)
d) (−3,−4,12)