you find a certain stock that had returns of 14.2 percent, -22.1 percent, 28.1 percent, and 19.1 percent for four of the last five years. assume the average return of the stock over this period was 12.20 percent.

what was the stock's return for the missing year? stock's return _____ percent

what is the standard deviation of the stock's returns? standard deviation ______ percent