1. Do this same kind of mapping with cities and states / regions in your country or some other country.
Done. Ex39 is my work.
2. Find the Ruby documentation for hashes and try to do even more things to them.
I still find it hard to learn using documentation.
3. Find out what you can’t do with hashes. A big one is that they do not have order, so try playing with that.
??? I dont understand what this means.