Requirements are in photos.
https://books.google.com.hk/books?id=ZWy4TexzsScC&printsec=frontcover&redir_esc=y&hl=zh-CN&sourceid=cndr#v=onepage&q&f=false
https://github-pages.princeton.edu/iexbvv8s8rmo/20-madelyn-marks/BM8GDHQHM-golden-dreams-california-in-an-age-of-abundance–1522670343.pdf
