Please use formulas instead of excel to solve this

a a 18. Stock Y has a standard deviation of 22 percent and a covariance with the market of 0.081. The expected return of the market is 14 percent with a standard deviation of 18 percent. The risk- free rate is 5.25 percent. What is the beta of Stock Y? A) 0.127 B) 1.67 C) 0.45 D) 2.5