Documentary is First Civilizations : Part 3 . Please number each answer. Thank you. Part A: Course Content Synthesis1. What factors contributed to the rise of the first cities and states?2. Why is a reliable supply of food essential to the rise of the first cities? Explain.3. How did increased productivity lead to specialization? What does specialization lead to?Part B: Self-reflection4. What fact did you find most surprising or interesting (from the readings or the documentary)? Why?