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 , sells one share at the beginning of 2020 , and sells all seven remaining shares at the beginning of 2021 . Required: o. What are the arithmetic and geometric average time-weighted rates of return for the imvestor? (Do not round intermediote calculations. Round your answers to 2 decimal ploces.) 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.) (Negotive value should be indicoted by a minus sign. Round your answer to 4 decimal places.) Answer is complete but not entirely correct