According to New Cartesian Sign Convention:

Describe the New Cartesian Sign Convention used in optics. Draw a labelled diagram to illustrate this is convention.

Giving reasons, state the 'signs' (positive or negative) which can be given to the following:

(a) object distance (u) for a concave mirror or convex mirror

(b) image distances (v) for a concave mirror

(c) image distances (v) for a convex mirror

One of the following does not apply to a concave mirror. This is:

If the magnification of a body of size 1 m is 4, what is the size of the image ?