4. Following are the historical returns (%) for the A and B common stocks: Year Ae Be 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 -2.86 5.55 3.77 1.34 6.362 4.63 -0.47 -3.71 3.86 5.72 -1.034 -1.334 1.27 1.064 11.142 3.47 -0.92 -1.50 3.08 8.72 4.22 2.10 1.19 2.52 i. Calculate the mean return for both stocks." ii. Calculate the standard deviation for both stocks. iii. Calculate the coefficient of variation and Sharpe Ratio (Rf = 1.5%) for both the stocks. iv. Which stock provides comparatively better risk adjusted returns