Please answer these four questions Much appreciate

20. Which of the following is(are) true? Choose two 2 points each a) For a given sale price, the higher the purchase price of a stock the greater the ROR. b) For a given sale price, the higher the purchase price of a stock the less the ROR. c) For a given purchase price, the higher the sale price of a stock the greater the ROR. d) For a given purchase price, the higher the sale price of a stock the less the ROR. 21. Which of the following is correct concerning a short sale? The greater the dividend paid by the stock: a) the more the stock needs to rise in price in order to profit. b) the more the stock needs to fall in price in order to profit. c) the less the stock needs to rise in price in order to profit. d) the less the stock needs to fall in price in order to profit. 22. The risk premium component of a stock price discount rate reflects:- a) investors' level of risk aversion b) earnings volatility of the industry sector to which the company belongs c) the leverage ratio of the company's balance sheet d) all the above 23. An investor purchases a stock on margin. If she sells it at a price lower than she paid (no dividend), then the higher the margin requirement: a) the more positive the ROI b) the less positive the ROR c) the more negative the RR d) the less negative the ROR