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Please answer all questions: 1. An f=7.95 cm convex lens produces an inverted image of a...

Please answer all questions:

1. An f=7.95 cm convex lens produces an inverted image of a 1.6 m tall person. If the lens must be 5.04 m from the person to produce a sharp image, what is the magnitude of the magnification (no - sign!)?

2. You put a convex lens with f=21.4 cm right next to a concave lens with f=-19.3 cm. The two lenses combined act like one single lens. What is the effective focal length of this combined lens?

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