Problem 6-7: Expected Return, Standard Deviation Calculate Adidas' and S&P 500 Index's average rate of returns and standard deviation, based on the data below. DATA Month Adidas Stock Prices 52.9 67.16 68.73 65.41 62.99 S&P 500 Index 2368.45 2363.64 2362.72 2384.2 2411.8 2423.41 2470.3 2471.65 2519.36 2575.26 2647.58 2673.61 Jan-19 Feb-19 Mar-19 Apr-19 May-19 Jun-19 Jul-19 Aug-19 Sep-19 Oct-19 Nov-19 Dec-19 70.1 69.05 62.81 61.85 64.99 70.42 72.55