Please provide formula for finding rate of return and also find the standard deviation of Stock B.

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Homework: Homework6 HW Score: 81.96%, 6.56 0 Question Help stocks. Given the information that follows, which investment is better, based on Score: 0.2 of 1 pt P7-7 (similar to) (Expected fisk (as measured by the standard deviation) and return? rate of return and risk) Syntex, Inc. is considering an investment in one of two common Common Stock A Common Stock B 035 0.30 035 Return 10% 17% 21% Probability 0.15 035 0.35 0.15 Return 496 5% 15% 23% a. Grenthe information n the table, to expected rate of ruim for stock ^ is The Standard devason of stock A is 465 % b. The expected rato ofreturn for stock B sQ. (Round to two decrnal places ) ,a95 % (Round to two deornal places) (Round to two decirnal places ) Enter your anewer in the answer box and then click Check Answer remaining Clear A