Use the table for the question(s) below. Consider the following probability distribution of returns for Alpha Corporation: Current Stock Price ($) Stock Price in One Year ($) Return R Probability PR $35 25% $25 $25 $20 40% 0% -20% 50% 25% The standard deviation of the return on Alpha Corporation is closest to: O 19.4%. O 22.4%. O 21.8%. O 19.0%