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An analyst expects to see only 3 possible economy conditions next year: recession (prob: 23\%), normal (prob: 58\%), and boom (prob: 19\%). Stock A will yield 2.5% return in recession, 10.5% return in normal, and 17% return in boom, while stock B will yield 28%,18%, and 41% returns, respectively. What are the standard deviations for the stocks? 1) A=4.38% and B=21.37% 2) A=4.73% and B=23.42% 3) A=4.94% and B=24.08% 4) A=4.51% and B=22.19%