Suppose that you wish to construct a telescope that can resolve features 9.0 km across on the moon, 384,000 km away. You

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Suppose that you wish to construct a telescope that can resolve
features 9.0 km across on the moon, 384,000 km away. You have a 3.2
−m -focal-length objective lens whose diameter is 14.0 cm .
Part A What focal-length eyepiece is needed if your eye can
resolve objects 0.10 mm apart at a distance of 25 cm?
Part B What is the resolution limit set by the size of the
objective lens (that is, by diffraction)?
Use λ=560nmλ=560nm.
Express your answer using two significant figures.