A portfolio consists of the following two investments: a bond with face value of $100.00 paying annual coupons of 9% maturing in 5 years an annuity with payments of $30.00 at the end of each year for 5 years The portfolio is comprised of 48% bonds and 52% annuities. The term structure is flat and the current yield is 10% pa effective. Calculate the duration (D) of the portfolio. Give your answer to 2 decimal places. D = years