A portfolio combines two assets: X and Y. The proportion of Asset X in the portfolio is 55%, and the proportion of Asset Y is 45%. The standard deviations of Asset X and Y are 8% and 17% respectively. Returns of Asset X and Asset Y are positively correlated as far as the covariance equals to 0.23 . What are return and standard deviation of this portfolio? 11.11%;11.73%12.05%;34.88%2.90%;5.07%9.76%;21.24%