XYZ stock price and dividend history are as follows: Dividend Paid at Year- Year Beginning-of-Year Price End 2007 $170 $5 2008 $180 $5 55 2009 $160 2010 $165 $5 $5 An investor buys 3 shares of XYZ at the beginning of 2007, buys another 2 shares at the beginning of 2008, sells 1 share at the beginning of 2009, and sells all 4 remaining shares at the beginning of 2010. Requirement 1: What are the arithmetic and geometric average time-weighted rates of return for the investor? (Round your answers to 2 decimal places. Omit the "%" sign in your response.) Arithmetic mean Geometric mean 2.24 % %