Exercise 12. geom_label colors

We previously used this code to make a plot using the state abbreviations as labels:

murders %>% ggplot(aes(population, total, label = abb)) +
  geom_label()

We are now going to add color to represent the region.

Rewrite the code above to make the label color correspond to the state's region. Because this is a mapping, you will have to do this through the aes function. Use the existing aes function inside of the ggplot function.