You invested $10,000 in a portfolio with an expected return of 2.2 per cent and $26,000 in a portfolio with an expected return of 11.2 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. 9.68% O b. 5.58% O c. 2.70% O d. 8.70%