ou find a certain stock that had returns of 19 percent, 6 percent, 21 percent, and 17 percent for four of the last five years. The average return of the stock over this period was 13.92 percent. (Do not round intermediate calculations and round your final answer to 2 decimal places. (e.g., 32.16)) What was the stocks return for the missing year? Stocks return % What is the standard deviation of the stocks returns? Standard deviation %