The image formed by a concave mirror

Explain the images formed by a concave mirror for different position of the object.

The real image formed by a concave mirror is larger then the object when the object is :

The real image formed by a concave mirror is smaller than the object if the object is :

The erect image formed by a concave mirror is of size double the size of object. How are u and v related?

What is the minimum distance between the object and its real image formed by a concave mirror and when is it possible ?

A real image formed by a concave mirror is 4.5 times the size of the object. If the mirror is 20 cm from the object, its focallength is

When is a virtual image formed by a concave mirror?