Standard Deviation for Both Stock A and B Please

You have a portfolio with a standard deviation of 23% and an expected return of 18%. You are considering adding one of the two stocks in the following table. If after adding the stock you will have 20% of your money in the new stock and 80% of your money in your existing portfolio, which one should you add? Expected Return 16% 16% Standard Deviation 24% 17% Correlation with Your Portfolio's Returns 0.3 0.7 Stock A Stock B Standard deviation of the portfolio with stock A is %. (Round to two decimal places.)