Lets say a portfolio combines two assets: X and Y. The weight of Asset X in the portfolio is 50%, and the weight of Asset Y is 50%. The standard deviation of return of Asset X is 21% and 8% for Asset Y. The covariance of returns of Asset X and Asset Y is 0.0058. What is the standard deviation of this portfolio?

Group of answer choices

10.11%

11.98%

12.64%

11.26%