Will an image be formed on the retina when the object is at a far distance? Will a clear image be formed ?

Will an image be formed on the retina when the object is at the near point ? Will it be possible to see a clear image ?

A virtual image of an object is formed at 30 cm away from a lens when an object is kept at a distance 20 cm away from it . What is the focal length of the lens ? Find the magnification of the image ?

A shaving mirror of focal length 72 cm is kept in a beauty clinic . Aman uses it standing 18 cm away from the mirror. A t what distance will the image be formed ? Is the image real or virtual ? What is the magnification of the image ?