The table below displays returns associated with a company's shares over the last 15 years. Return Return Return Year Year Year (% pa) (% pa) (% pa) 2006 21 2011 13 2016 3 2007 27 2012 5 2017 -3 2008 19 2013 5 2018 17 2009 13 2014 10 2019 1 2010 32 2015 31 2020 8 Based on this historic data, calculate the expected return on the shares and its standard deviation. Give your answers as a percentage per annum to 2 decimal places. a) Expected return = b) Standard deviation % pa % pa