Using R and the data set below please create a code to do the following:

library(GISTools) data(georgia)

The variable PctRural gives the percentage of the county's residents classified as rural. Without using the choropleth function, create a three-color choropleth map that differentiates urban counties (no more than 10% rural), suburban counties (between 10% and 70% rural) and rural counties (at least 70% rural).