At the beginning of the year, you purchased a share of stock for $50. Over the year the dividends paid on the stock were $2.80 per share. a. Calculate the return if the price of the stock at the end of the year is $45. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places. (e.g., 32.16)) b. Calculate the return if the price of the stock at the end of the year is $55.