8-9. (Estimating betas) Consider the following stock returns for B&A Trucking, Inc., and the market index: B&A Trucking, Inc., stock returns 25% 20% 15% 10% 5% Market index returns -25% -20% -15% - 10% 5% 10% 15% 20% 25% -5% -5% -10% -15% -20% -25% Use the visual method described in Figure 8.3 to estimate the beta for B&A. Is the firm more or less risky than the market portfolio? Explain