The diagram given below shows an object $\mathit{O}$ and its image $\mathit{I}$.Without actually drawing the ray diagram, state the following :
(i) Type of lens (Converging/Diverging)
(ii) Name two optical instruments where such an image is obtained.
(iii) List three characteristics of the image formed if this lens is replaced by a concave mirror of focal length ' $\mathit{f}$ ' and an object is placed at a distance ' $\mathit{f}∕2$ ' in front of the mirror.