Juanita is an occasional investor in the stock market and maintains an investment fund for her holdings. At the beginning of 2020, she had an investment fund with $25,000 in it. On May 1 she was able to contribute an additional $3000 to her fund, and on August 1 she sold some of her mutual funds in the fund for $6000. At the end of the year her fund had $23,600 in it.

a. Find Juanitas exact dollar weighted yield rate for 2020 (using definition 2.6.6).

b. Find Juanitas estimated dollar weighted yield rate for 2020 (using equation 2.6.9).