Consider an economy where only the following two stocks exist.

Stock A: Expected Return () = 10% Standard Deviation () = 10% Stock B: Expected Return () = 5% Standard Deviation () = 5% Based on these two stocks, Bill constructs a portfolio with an expected return (portfolio) of 8% and a standard deviation (portfolio) of 6%. What is the correlation (AB) between the returns of stocks A and B?

Show work eg not excel