Please answer the following three questions. Each answer should have about 250 words. 3. Please describe the economic, social, and political chacteristics of two of the following four ancient states: (Nile River Valley/Egypt); (Tigris-Euphrates/ Mesopotamia); Indus River Valley/India); and Hwang-Ho or Yellow River/China)! 4. Please describe the economic, social, and political characteristics of one ancient African and one ancient American (pre-Columbian) civilization! 5. Please compare and contrast the the following classical civilizations: Greek/Hellenistic, Roman, and Persian)!