1. The return on the risky portfolio is 15%. The risk-free rate, as well as the investors borrowing rate, is 10%. The standard deviation of return on the risky portfolio is 20%. If the standard deviation on the complete portfolio is 25%, the expected return on the complete portfolio is ________.

   1. 6%

   2. 8.75 %

   3. 10%

   4. 16.25%