HW Help. Needs to be answered in 1-2 hrs

These are all short answers, 3 sentences or more. No giant paragraphs.

 5. Please explain why the Sui Dynasty was able to reunite the Chinese homeland into a single state, why the Tang Dynasty caused a flourishing of Chinese culture, and why the Song Dynasty was unable to preserve the unity of China when it was confronted by the Nomadic Dynasties.
 
6. Please evaluate the argument that, when comparing Chinese influence in Vietnam, Korea, and Japan, the largest amount of influence occurred in Korea, and the smallest amount of influence occurred in Vietnam. Please use specific facts to support your arguments.
 
7. Please use specific facts about technological, economic, and political history to evaluate the argument that the ENSO (also named “El Nino”) weather pattern reduced the rate of technological advancement in the Mesoamerican and Andean Civilizations, and as a result, they did not invent military technologies that would have allowed them to permanently repulse the invasions by Spain during the 1500s.

  
8. Please use specific facts to justify the argument that, during the Medieval Era (476 CE to 1402 CE), the Sub-Saharan African Civilizations significantly participated in cultural and economic exchanges with Europe and Asia. In your answer, please do not consider the Prehistoric Era (to 3200 BCE) and the Ancient Era (3200 BCE to 476 CE).