standard deviation of portfolio with stock a as %

standard deviation of portfolio with stock b as %

which one to add

You have a portfolio with a standard deviation of 20% and an expected retum of 16%. You are considering adding cne of the two stocks in the following tablo. If afler adding the stock you wilt haw 30% of your money in the new stock and 70% of your money in your existing portfolio, which one should you add