Question: e lower half aids her in examining her students' work from a cozy distance of 2 5 cm . What should be the powers of

e lower half aids her in examining her students' work from a cozy distance of 25 cm.
What should be the powers of the:
(a) top lens to recognize her students from afar, and
(b) bottom lens to meticulously grade papers at 25 cm?

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