You are analyzing the historical performance of a stock. The annual returns for the last ten years are shown below.

Year Ann Ret

2018 12%

2017 9%

2016 5%

2015 3%

2014 13%

2013 6%

2012 20%

2011 0%

2010 6%

2009 14%

Calculate the average annual return, the variance and standard deviation of this stock over the tenyear period.