6. 3 points Mr. Zhang has $250,000 in his investment fund at the start of the year. 2 months later, he withdraws $110,000. Another 3 months later (5 months from the start of the year), he withdraws a further $80,000 (there is enough money in the fund to cover this withdrawl). After another 3 months, (8 months from the start of the year), he inherits some money and invests $300,000 in the fund. At the end of the year, there is $410,000 in the fund. What is his Dollar-weighted rate of return for the year