XYZ's stock price and dividend history are as follows: Beginning of Year Price $ 120 144 105 130 Dividend Paidat Year-End 34 Year 2015 2015 2020 2021 4 An Investor buys three shares of XYZ at the beginning of 2018, buys another two shares at the beginning of 2019, sells one share at the beginning of 2020, and sells all four remaining shares at the beginning of 2021 a. What are the arithmetic and geometric average time-weighted rates of retum for the investor? (Round your year-by-year rates of return and final answers to 2 decimal places. Do not round other calculations.) Arithmetic average rate of return Geometric average rate of return att b. What is the dollar weighted rate of return? (Hint Carefully prepare a chart of cash flows for the four dates corresponding to the turns of the year for January 1, 2018. to January 1, 2021. If your calculator cannot calculate Internal rate of return, you will have to use trial and erro) (Round your answer to 4 decimal places. Negative amount should be indicated by a minus sign.) > Dollar weighted rate of return