a)What is the value of NPV when discount rate is zero? When discount rate is equal to IRR and when discount rate is greater than IRR. b)If a highly risk averse investor wants to invest in common stocks, what will be the betas of the stocks in which he will invest, will it be less than 1.0 or more than 1.0. State the reason. c)While forecasting future sales, internal sales forecast is more appropriate or external sales forecast? d)When the constant growth dividend valuation model is used to explain a stocks current price, the quantity (ke g) represents the expected dividend yield. Is this statement right or wrong? Explain. e)In what sense is the treatment of bonds and preferred stock the same when it comes to valuation?