(i) He should use a concave mirror, as it forms a real image on the same side of the mirror.
(ii) Object distance, u=-12cm
Image distance, v=-48 cm
Magnification, m=-v/u=-(-48)/(-12)=-4
The minus sign in magnification shows that the image formed is real and inverted.
(iii) The image is formed at a distance of 35 cm from the object.
(iv)
In this case, the image is formed beyond the center of curvature. This image is real, inverted and enlarged.