An investor buys three shares of XYZ at the beginning of 2018, buys another one shares at the beginning of 2019, sells one share at the beginning of 2020, and sells all three remaining shares at the beginning of 2021. Required: 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 time-weighted average returns Geometric time-weighted average returns 3.80 % 2.28% b-1. 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. (Negative amounts should be indicated by a minus sign.) Date Cash Flow 01/01/2018 01/01/2019 01/01/2020 01/01/2021