30. Suppose you have predicted the following returns for Apple Inc. stock in three possible states of nature. What is the standard deviation of Apple Stock? State State Probability. Apple Returns Boom 0.4 4.4% Normal 0.2 6% Bust - 2% A) 2.16 B) 2.9 C) 0.004 D) 0.0004 E) 0.034467