can you help me ASAP?

United United States Kingdom Spain 12 5 Expected return Standard deviation of 15 10 return Correlation with the L.0 0.33 United States a. What are the expected return and standard devia tion of return ofa portfolio with 25% invested in the United Kingdom and 75% in the United States? b. What are the e return and standard deviation of return of a portfolio with 25% invested in Spain 75% in the United States