A farsighted person has a near point that is 67.0 cm from her eyes. She wears eyeglasses

Question:

A farsighted person has a near point that is 67.0 cm from her eyes. She wears eyeglasses that are designed to enable her to read a newspaper held at a distance of 25.0 cm from her eyes. Find the focal length of the eyeglasses, assuming that they are worn
(a) 2.2 cm from the eyes
(b) 3.3 cm from the eyes.