Question 4

Suppose we want to draw continents, countries, states and towns. The drawing() operation differs for each object: countries are shown with a specific colored border, states are shown with a specific colored dashed border, towns are pictured as different colored bullets, etc. For example, North America has countries like Canada, United States, and Mexico. Some of their states are Quebec, Ontario, Columbia, Texas, Louisiana, Arizona, etc. Some of their towns are Montreal, Toronto, Vancouver, Houston, Beaumont, New Orleans, Tucson, New Mexico, Guadalajara, etc. Write a design pattern that allows you to manipulate a single instance of the object just as you would do for a group of them when drawing them on a map.