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 Price Action Buy 3 shares Sell share 150 Sell 1 share Sell 1 share 0 1 2 3 $ 120 150 150 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 retum % 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 retum b. Calculate the time-weighted arithmetic average return on this portfolio. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Anthetic average retur c. Calculate the dollar-weighted average return on this portfolio. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Dollar weighted werage retur %