You invested $14,000 in a portfolio with an expected return of 4.7 per cent and $24,000 in a portfolio with an expected return of 13.5 per cent. The expected return of the combined portfolio is (as a percentage to two decimal places eg 2.881% is 2.88))

a.

10.26%

b.

11.49%

c.

5.20%

d.

7.92%