You put 70% of your money in a stock portfollo that has an expected return of 120 and a standard deviation of 240 . You put the rest of yoie naney in a rivity bond portfolio that has an expected return of 6% and a standard deviation of 12%. The stock and bond portfolios hwve a correlation of 3 , What is the standart deviation of the resulting portfolio? a) 19.4% b) 20.1% c) 17.3% d) 16.5% e) 18.2%