$($a$)$

What magnification in multiples is produced by a $0\mathrm{.}150$ cm focal length microscope objective that is $0\mathrm{.}175$ cm from the object being viewed?

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$($b$)$

What is the overall magnification in multiples if an eyepiece that produces a magnification of $8\mathrm{.}30$ is used?

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