Company XYZ.s stock prices and the market index for the past four years are given in the following table. The current risk free rate is 7.2%. Use the data answer the following questions (Of course, the reliability of statistics calculated with only four pairs of data is low). Stock Market price of 3 year ago is $27.13 with index of 9917. 2 year ago a market price of $25.68 with index of 10638. 1 year ago with market price of $23.62 with index of 10000. Current market price is $30 with index of 10800 2. What is the required return of the stock