6. At the beginning of the year, a fund began with an initial deposit of 900. A deposit of 1000 was made at the end of 4 months. Withdrawals of 300 and 500 were made at the end of 6 months and 8 months, respectively. The amount in the fund at the end of the year is 1540. Calculate the dollar-weighted (money-weighted) yield rate earned by the fund during the year