Ty received a separation payment of $25,000 from his former employer when he was thirty-five years old. He invested that sum of money at 5.5% compounded semi-annually. When he was sixty-five, he converted the balance into an ordinary annuity paying $6000 every three months with interest at 8% compounded quarterly, For how long will the annuity continue to pay him? The annuity will continue to pay him for quarterly periods. (Round up to the nearest whole number.)