XYZ stock price and dividend history are as follows: An investor buys four shares of XYZ at the beginning of 2010 , buys another two shares at the beginning of 2011 , sells one share at the beginning of 2012, and sells all five remaining shares at the beginning of 2013 . 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.) b-1. Prepare a chart of cash flows for the four dates corresponding to the turns of the year for January 1, 2010, to January 1,2013. (Negative amounts should be indicated 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 trial and error.) (Negative value should be indicated by a minus sign. Round your answer to 4 decimal places.) Rate of return %