A slide projector needs to create a 84-cm-high image of a 2.0-cm-tall slide. The screen is 300 cm from the slide.

A. What focal length does the lens need? Assume that it is a thin lens.
Express your answer to two significant figures and include the appropriate units.

B. How far should you place the lens from the slide?
Express your answer to two significant figures and include the appropriate units.