You consider 4 stocks with the following correlations

Corr(1,2)=0.25; Corr(1,3)=0.60; Corr(1,4)=0.45. Each stock has the same expected return of 10% and standard deviation of 20%.

Assume your portfolio currently has only $100,000 of stock 1. You would like to invest another $100,000 in only one stock (2,3,4). Which stock (you choose only one stock among 2,3,4) would be the best to add to your current portfolio. Justify your answers. Calculate the expected return and standard deviation of your new portfolio after adding that stock.