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 l share Sell l 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.) Geometric average return b. Calculate the time-weighted arithmetic average return on this portfolio. (Do not round Intermediate calculations. Round your answer to 2 decimal places.) % Arithmetic average return Geometric average return % b. Calculate the time weighted arithmetic average return on this portfolio. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Arithmetic average return % c. Calculate the dollar-weighted average return on this portfolio. (Do not round intermediate calculations. Round your answer to decimal places.) Dollar-weighted average return %