A child who is 1.20m tall stands on a 0.30m high wooden stool in front of a vertically mounted plane mirror. The child’s eyes are 0.10m below the top of the head.
(i) Find the minimum length of the mirror that will allow the child to see the entire image from head to toes while standing on the stool.
(ii) How high above the floor should the bottom edge of the mirror be fixed so that the child just sees the feet in the image?