Indicate (Y/N) whether a problem is macroeconomic or not. (判断以下是否属于宏观经济学范畴,回答时请写题号+Y/N) 1. Establishing an optimal level of production under the conditions of perfect competition (Y/N) 2. Determining the optimal level of state debt (Y/N) 3. Circulation of money (Y/N) 4. Monopolistic competition (Y/N) 5. Supply and demand for labor (Y/N) 6. Investment theory (Y/N) 7. Inflation theory (Y/N) 8. Determining price and quantity produced by an individual firm (Y/N)