The teacher can see William and Colin (only by reflection in the mirror)
And Colin can see the Headteacher and Raj (Only by reflection in the mirror)
For this it’s best to draw a straight line from one person to another through the mirror, to see how light will reflect. Also because of the wall in the middle, Carolyn, Mike, Terry, and Alison can’t see the mirror, so no one can see them. Then you have to use deductive reasoning to see who can see who with the mirror.
