An Investor buys three shares of XYZ at the beginning of 2015, buys another one shares at the beginning of 2016, sells one share at the beginning of 2017, and sells all three remaining shares at the beginning of 2018. a. What are the arithmetic and geometric average time-weighted rates of return for the Investor? (Do not round Intermediate calculations. Round your answers to 2 decimal places.) Arithmetic mean (0.13) % Geometric mean (1.65) % b-1. Prepare a chart of cash flows for the four dates corresponding to the turns of the year for January 1, 2015, to January 1, 2018. (Negative amounts should be Indicated by a minus sign.) Date Cash Flow 01/01/2015 $ (312) 01/01/2016 (109) 01/01/2017 01/01/2018 98 321 b-2. What is the dollar-weighted rate of return? (Hint: If your calculator cannot calculate Internal rate of return, you will have to use a spreadsheet or trial and error.) (Negative value should be Indicated by a minus sign. Round your answer to 4 decimal places.) Rate of return