(a) Farah is in her early 60s and planning to retire within the next couple of years. Aside from her savings in her CPF account and a HDB flat, she does not have any other valuable assets. She expects to have a modest retirement lifestyle and will likely live past eighty years old. The following are some financial products available for investment: The Straits Times Index (STI) Early start-up business Corporate bond with AAA rating Ether (cryptocurrency) Discuss which financial products Farah should and should not invest for her retirement (16 marks) (b) Examine the impact on a firm's weighted average cost of capital (WACC) if beta increases and there is decline in financial leverage. (6 marks)