When does a concave mirror form a virtual image ?

When does a concave mirror form a vritual image?

When does a concave mirror from virtual image ?

Can a concave mirror form a virtual image of same size as the object?

State whether the following statements are True or false: A concave mirror always forms a virtual image.

A concave mirror forms a virtual image of size twice that of the object placed at a distance 5 cm from it . Find position of image .