Two investors have invested in shares that most likely will perform the same as the S&P/ASX 200 index, Investor Alpha has invested using $100,000 of his own money. Investor Beta has invested using $100,000, of which $40,000 has come from a margin loan. Estimate each investor's return on equity if the market, as measured by the S&P/ASX 200 index, falls 20%. A) Alpha return on equity (2 marks) B) Beta return on equity (4 marks)