A thin lens with a focal length of 6.00 cm is used as a simple magnifier. (a)

Question:

A thin lens with a focal length of 6.00 cm is used as a simple magnifier.
(a) What angular magnification is obtainable with the lens if the object is at the focal point?
(b) When an object is examined through the lens, how close can it be brought to the lens? Assume that the image viewed by the eye is at the near point, 25.0 cm from the eye, and that the lens is very close to the eye.