The historical returns for CCC for 2012 to 2015 are:

Stock return: 2012 (5.00%), 2013 (3.40%), 2014 (6.00%), 2015 (8.40%), 2016 (2.60%)

Given the preceding data, the average realized return on CCC's stock is ____.

The preceding data series represents ___ of CCC's historical returns. Based on this conclusion, the standard deviation of CCC's historical returns is ____.

If investors expect the average realized return from 2012 to 2016 on CCC's stock to continue into the future, its coefficient of variation (CV) will be ____.