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Compute the each part given question:

Question: A double convex lens has faces of radii 18.0 cm and 20.0 cm. When an object is placed 24.0 cm from the lens, a real image is formed 32.0 cm from the lens.

Part I: Determine the focal length of the lens.

Part II: Determine the index of refraction of the lens material.

I need expert help to solve the above question and thanks in advance.

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