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Compute each part of given question:

Question: The image of a tree on a 35 mm color slide is 1.1 mm high. It is to be projected onto a screen 8 m from the slide, and is to appear 643 mm high.

Part I: What focal length lens (in meters) is needed?

Part II: What is the distance in meters between the lens and the slide?

Part III: What is the magnification of the system?

I want you to explain the physics in this problem.

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