Download the attached file to view the complete content. Key questions extracted: 1. Definition of productive efficiency and its implications. 2. Impact of government taxes on sugary drinks and market failures addressed. 3. Role of cost–benefit analysis in infrastructure projects like city-airport railway connections. 4. Characteristics and implications of monopolistic and perfect competition in the long run. 5. Causes and consequences of economic inequality and measures to reduce it. 6. Strategies for sustainable growth in economies with limited resources and high unemployment.