A manager buys three shares of stock today, and then sells one of those shares each year for the next 3 years. His actions and the price history of the stock are summarized below. The stock pays no dividends. Time 0 1 2 3 Price $ 200 220 220 220 Action Buy 3 shares Sell 1 share Sell 1 share Sell 1 share a. Calculate the time-weighted geometric average return on this portfolio. (Do not round intermediate calculations. Round your answer to 2 decimal places.) X Answer is complete but not entirely correct. Geometric average 10.00 X % return b. Calculate the time weighted arithmetic average return on this portfolio. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Arithmetic average 1.72 X % return c. Calculate the dollar-weighted average return on this portfolio. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Dollar-weighted average 1.75 X % return