If Quinton is standing behind a tall fence, and he places a mirror at his feet angled towards the sky, can Zara, who is on the other side of the fence, see Quinton's face in the mirror?

Respond very briefly.
Zara cannot see Quinton's face in the mirror. The mirror angled towards the sky would reflect the sky and perhaps the top edge of the fence depending on its height and the angle of the mirror. Since Quinton is behind the fence and the mirror is at his feet, his face is not in the line of sight of the reflective surface of the mirror, and therefore, it cannot be reflected for Zara to see. The fence occludes Quinton's face from Zara's direct line of sight, and the mirror does not redirect this occluded line of sight to Zara's position.