What major changes in political structures and social and economic life occurred during each of the following 1.

What major changes in political structures, and social and economic life, occurred during each of the following?
1. The Sui dynasty
2. The Tang dynasty
3. The Song dynasty

FORMAT:
Length: 4 pages double spaced
No page headers
Times New Roman, 12 point
Sources: APA format
Margins: 1” all sides, A4