can you please answer all the following 7 questions?

the word limit is only 100-150 words

1. When it comes for the production; Why we refer to the market mechanism? 2. How will the Covid-19 (coronavirus) affect the concept of a production possibility curve? 3. If locusts attack Brazil's farms, which factors of production will be affected? And with what order? 4. From macroeconomic perspective, how European Union applies international trading? 5. How do you decide how much time you spend on homework in a day? (Think as an economist) 6. What are the opportunity costs of developing wind farms to generate "clean" electricity? Should we make the investment? 7. Why do people around the world have so much faith in free markets