In order to finance her retirement, Sandra needs her portfolio to have an expected return of 12.6 percent per year for the next 30 years. You have decided to invest in stocks 1, 2, and 3, with 25 percent in stock 1, 50 percent in stock 2, and 25 percent in stock 3. If stocks 1 and 2 have expected returns of 9 percent and 10 percent per year, respectively, so what is the minimum expected annual return for Stock 3 that is likely to allow Sandra to meet her investment requirement? (Round your answer to 1 decimal place, for example, 17.5%).