a) Explain why some public policies are necessarily pro-poor using the concept of social indifference curves. (3 marks)

b) The existing world income distribution is Pareto efficient as it is. In another words, Elon Musk continuing to touring space is absolutely finefrom an economic efficiency perspective while millions are starving out of hunger in developing economies. Explain including one of the criticisms of the Pareto efficiency concept. ( 2 marks)