Stock W has the following returns for various states of the economy:

State of the Economy	Probability	Stock W's Return
Recession	25%	-22%
Average	55%	16%
Boom	20%	35%

Stock W's expected rate of return is: 10.3%, 12.68%, 13.51%, or 14.63%

What is Stock Ws standard deviation of returns: 20.02%, 36.96%, 12.95%, or 43.46%