Part II : Calculations Question ] You need to use the ' TIFUL KM_ data. XIs' file to answer this question . The file lists the monthly prices and dividends of the Standard & Poor's 500 Depository Receipts ( SPY ). Tiffany , and Lockheed Martin . The file also includes the yields of Treasury bills . Compute the alpha and the beta coefficients of Tiffany and Lockheed Martin over the whole sample period . Interpret your results . Which stock has more systematic risk ? Note : I have computed for you the monthly return of the S&P , Tiffany and Lockheed . You need to compute excess returns for these assets to answer the question . Hint : You can use Google Sheets instead of Microsoft Excel to answer this question . Sheets have two built-in functions to estimate an alpha and a beta of a univariate regression : INTERCEPT and SLOPE , respectively . Alternatively , you can click on Add ons - > Manage Add-ons in the menu and install the XIMiner Analysis ToolPak , which replicates the Data Analysis Add- on in Excel . Use the " Linear Regression" tab and input the X range ( SPY ) , the * range ( Tiffany or Lockheed ) , and the output range ( click on a cell where you want the output to be written )