Use adjusted prices for CVS Health Corporation (CVS), General Dynamics (GD), JPMorgan Chase & Co. (JPM), and Kimberly-Clark Corporation (KMB), from December 31, 1987 to December 31, 2017 to answer the following questions. You can find the prices on Yahoo Finance. Assume risk-free rate to be 2.50%. Download month-end adjusted prices of common stocks for the four companies mentioned above. (When you download month-end price from Yahoo, it is going to show first day of the month, but the price is from the last day of the month. Only paste the month-end prices of the 4 companies in the file you submit.)(10) Find yearly returns for 30 years from 1988 to 2017. (You need to use just the year-end prices for this. For example, return for year 1988 can be found by using adjusted price of Dec 1987 and adjusted price of Dec 1988.) (6) Find mean annual returns for the 4 stocks. (2) Find the covariance matrix of the four stocks using yearly returns. (assume the order of stocks to be CVS, GD, JPM and KMB. You can use any method for this.) (6)

(Answers in excel file please)