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Jason is farsighted and needs +3.50-D eyeglasses in order to have a normal near point of...

Jason is farsighted and needs +3.50-D eyeglasses in order to have a normal near point of 25 cm. Assume that these eyeglasses are worn 2.00 cm from the eye.
(a) What is the focal length of Jason’s glasses?
(b) What would be Jason’s near point if he’s not wearing glasses?
(c) His wife, who has a normal near point of 25 cm, decides to try Jason’s glasses. What is her near point while she wears them?

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