Pls answer the all questions thank

Please list and answer the following questions from chapter Two: Answer each of the following questions: 1 - Explain the conditions that lead to economic scarcity? 2 - Name the three main categories of economic trade-offs. Give an example from one of your economic decisions that illustrate one of these trade-offs. 3- What are the three main components of interest rate? 4- Why is a production possibility frontier curved? I (See the textbook section in chapter two titled "The shape of the Production Possibility Frontier and Diminishing Marginal Returns." Also see the content topics titled 'Opportunity cost video" and "Production Possibility Frontiers video"-uvili:) 6- What is the difference between a positive and normative statement? 7- Overall do you think self-interest is a good thing for society? (In your answer please consider the benefits of new inventions and innovations for both consumers and producers)