A concave shaving mirror has a radius of curvature of 28.0 cm. For each of the following cases, find the magnification and determine whether the image formed is real or virtual and upright or inverted.

(a) an upright pencil placed 41.6 cm from the mirror.

(b) an upright pencil placed 28.0 cm from the mirror.

(c) an upright pencil placed 7.6 cm from the mirror.