Your task in physics laboratory is to make a microscope from two lenses. One lens has a focal length of $2\mathrm{.}7$ cmcm $,$ the other $1\mathrm{.}5$ cmcm $.$ You plan to use the more powerful lens as the objective, and you want the eyepiece to be $15\mathrm{.}0$ cmcm from the objective.

Part A

For viewing with a relaxed eye, how far should the sample be from the objective lens? $$

Express your answer with the appropriate units.

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ss $=$

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Part B

What is the magnification of your microscope? $$

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