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A beam of light emanates from the point (0,2,3) and hits a plane, y + z...

A beam of light emanates from the point (0,2,3) and hits a plane, y + z - 1 = 0, It bounces off the plane(reflected by) and then travels through the point (1,2,5).

1) What is the unit direction vector along which the beam emanates from the point (0,2,3).

2) Find the point of incidence where the beam hits the plane.

3) Find the angle between the planes normal vector, and the beam of light which hits the plane.

This problem has been giving me problems for a few hours. please help.

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