Find the standard deviation of Terry's stock, giving the following information:

year return

2011 22%

2012 -8%

2013 19%

a. 13.49%

b. 11.00%

c. 11.72%

d. 11.50%

e. none of the above.

Given that the expected returns of stocks A and B are 10% and -10% respectively, what is the covariance of return between these stocks?

year Return A Return B

2017 55% 35%

2016 30% -20%

2015 15% 30%

a. 91.667%^2

b. 91.667%

c. 66.67%^2

d. 0.00%^2

e. none of the above