XYZ stock price and dividend history are as follows: An Investor buys slx 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 seven remaining shares at the beginning of 2021 . Requlred: a. What are the arlthmetic and geometric average time-weighted rates of return for the Investor? (Do not round Intermedlate calculations. Round your answers to 2 decimal places.) b-1. Prepare a chart of cash flows for the four dates correspondlng to the turns of the year for January 1,2018 , to January 1 , 2021. (Negatlve amounts should be Indlcated by a minus sign.) 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 trlal and error.) (Negatlve value should be Indlcated by a minus sign. Round your answer to 4 decimal places.)