I've been doing this question for twenty minutes now and have gotten absolutely nowhere with it. Any help/answer and working would be greatly appreciated, as I am getting tired and perplexed.

"The monitor screen of a scanning electron microscope is 200mm x 200mm, and is scanned in 500 lines. If the corresponding area of a specimen is 1 micrometer (1x10 to the -6 m) x 1 micrometer, show that the linear magnification is 100,000. Also show that the system can resolve 2nm on a specimen.