Who were the Anasazi, what area of the world did they live, and why did their society collapse?

Please answer the following questions. Each answer should be about a page long.
1. Who were the Anasazi, what area of the world did they live, and why did their society collapse? Make sure to discuss the three types of agriculture that emerged in their area, and also what tree rings and packrat middens can tell us.
2. Who were the Vikings, in what areas of the world did they live, and why did some of their colonies collapse? Make sure to discuss their subsistence and economic strategies, and also how they interacted with native peoples they came across.

APA Style