What is the nature of a mirror having a focal length of, +10 cm ?

According to the "New Cartesian Sign Convention" for mirrors, what sign has been given to the focal length of:

(i) a concave mirror?

(ii) a convex mirror ?

Which type of mirror has :

(a) positive focal length?

(b) negative focal length?

What kind of mirror can have a focal length of, - 20 cm ?

Complete the following sentence:

All the ______ are measured from the Pole of a spherical mirror.