Question 3 [16 marks] Explain how the equilibrium real interest rate, national saving, and investment would likely change in each of the following scenarios, and illustrate your answer with a well-labelled graph of the market for loanable funds. a) Households fear there may not be sufcient COVID-19 vaccine for everyone any time soon, and become more pessimistic about the economy. [8 marks] b) Businesses become more optimistic about the future of the economy and decide to distribute more of their earnings as dividends to their shareholders. Assume that the shareholders spend those dividends. [8 marks]