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. Tine 1 2 Price $ 110 120 120 120 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.) 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.) Arithmetie average retum c. Calculate the dollar-weighted average return on this portfolio (Do not round intermediate calculations. Round your answer to 2 decimal places.) Dofia-weighted average return