Question 5 Find below the total population of stock market index and T-Bills percentage returns between 2013 and 2017: Year 2010 2011 2012 2013 2014 2015 2016 2017 Return on JSE T-Bills return -37.23% 5.24% 28.30% 5.80% 17.16% 6.00% 0.98% 6.00% 16.06% 6.01% 20.46% 6.12% 23.85% 6.46% 18.88% 6.89% a. What is the geometric average risk premium for the period between 2010 and 2017? (15 Points) b. What is the standard deviation of the risk premium for the period 2010 and 2017? (15 Points)