6. Assume that we know the performance of the S&P 500 Index for the first five years of the second decade of the 21st century, defined as 2010-2019. What annual geometric mean must the market average for the last five years (2015-2019) to produce an over- all geometric mean for the decade of 10 percent? The returns for the first five years are 2010, 15.06 percent 2011, 9.9 percent; 2012, 16.1 percent; 2013, 19.7 percent; and 2014, 10.7 percent