(1 point) Gretchen invests 5800 dollars in a mutual fund on January 1. On March 1, she learns that her fund balance is 3400 dollars, and she then withdraws 1500 dollars. On August 1, her fund balance is 7100 dollars, and she then deposits 1300 dollars. On the following January 1, her fund balance is 7700 dollars. What is Gretchen's dollar-weighted rate of return? (Assume simple interest and months of equal length.) Answer = percent