Please help me solve for standard deviation

Return to 6 Asset K has an expected return of 16 percent and a standard deviation of 31 percent. Asset L has an expected return of 9 percent and a standard deviation of 15 percent. The correlation between the assets is 0.40. What are the expected return and standard deviation of the minimum variance portfolio? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal 10 points places.) Answer is complete but not entirely correct. 9.34 Expected return Standard deviation 14.30 %