Airnova Inc. is considering four different types of stocks. They each have a required return of 20 percent and a dividend of $3.75 for share. Stocks, A, B, and C are expected to maintain constant growth rates in dividends for the near future of 10 percent, 0 percent, and -5 percent, respectively. Stock D is a growth stock and will increase its dividend by 20 percent for the next two years and then maintain a constant 12 percent growth rate after that. Please answer with the formula used. What is the dividend yield for each of the four stocks? Discuss the relationship between the returns of each of these stocks.