Characteristic Line and Security Market Line You are given the following set of data: a. Use a spreadsheet (or a calculator with a linear regression function) to determine stock X's beta coefficient. Beta = ____ b. Determine the arithmetic average rates of return for Stock X and the NYSE over the period given. Calculate the standard deviations of returns for both Stock X and the NYSE. Round your answers to two decimal places. c. Assume that the situation during Years 1 to 7 is expected to prevail in the future (i.e., r bar_X, = r^bar _X, Average, r^bar _M, Average, and both sigma _x and sigma _y in the future will equal their past values). Also assume that Stock X is in equilibrium - that is, it plots on the Security Market Line. What is the risk-free rate? ____