what is the weight of $b$

what is the return of stock $A$

what is the return of stock b

what is the standard deviation on stock a$?$

what is the standard deviation on stock b$?$

what is the coefficients of variation on stock a$?$

what is the return of the portfolio?

What is the covariance between a and $b?$

what is the correlation

what is the standard deviation of the portfolio?