You invested $15,000 in a portfolio with an expected return of 7.7 per cent and $19,000 in a portfolio with an expected return of 17.6 per cent. The expected return of the combined portfolio is (as a percentage to two decimal places eg 2.881% is 2.88)) Select one: a. 13.23% b. 14.14% c. 8.20% d. 9.59%