[delan]

These are very valid points that I did not consider when I was constructing the example data.

I've replaced city and population with country and area to reduce confusion.

[fabricode]

Fantastic.

I clicked on your CV just because the link was available on the side, and I was shocked to find out that you're still in high school. There are professionals that would have taken 10x as long to explain it only half as clearly. For context, I've been in the business for ~25 years. Keep up the great work.