First obtain monthly returns for a sample of 10 firms and the S&P 500 from the Market Insight database at www.mhhe.com/edumarketinsight. Then obtain the corresponding returns on the HML (high minus low book value) and SMB (small minus big) portfolios from Ken French's website at http://mba.tuck.dartmouth.edu/pages/faculty/ken.french/data_library.html. Finally, obtain monthly interest rates from the Fed's website at www.federalreserve.gov/releases/h15/data.htm. Evaluate the alphas of each firm over the last 3 years as the intercept in a first-pass regression using excess returns in a single-index model. Then evaluate the alphas using a first-pass Fama-French three-factor multiple regression. Under which model is alpha more variable across firms? What do you conclude?