An analyst has estimated how a particular stock's return will vary depending on what will happen to the economy: State of the Economy Probability of State Occurring Stock's Expected Return if this State Occurs Recession 0.1 -60% Below Average 0.2 -10% Average 0.4 15% Above Average 0.2 40% Boom 0.1 90% What is the standard deviation of the company's stock return? a. 37.08% b. 32.45% c. 44.24% d. 2.472 e. 3.04%