XYZ stock price and dividend history are as follows: An investor buys five shares of XYZ at the beginning of 2018, buys another three shares at the beginning of 2019 , sellis one share at the beginning of 2020 , and sells all seven remaining shares at the beginning of 2021 . Required: a. What are the arithmetic and geometric average time-weighted rates of retum for the investor? (Do not round intermediate calculations. Round your answers to 2 decimal places.) 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.)