if you invested a 20% in a stock with expected return of 14% and expected standard deviation of 21% and the rest of your money would be with a stock

if you invested a 20% in a stock with expected return of 14% and expected standard deviation of 21% and the rest of your money would be with a stock of 12% expected return and 8% of expected standard deviation and they have a correlation coefficient of 0. what would be your expected standard deviation of your protfolio?