Franklin Templeton has just invested $9,260 for his son (age one). This money will be used for his son's education 18 years from now. He calculates that he will need $71,231 by the time the boy goes to school. What rate of return will Mr. Templeton need in order to achieve this goal? Use Appendix B for an approximate answer, but calculate your final answer using the formula and financial calculator methods. (Enter your answer as a whole percentage (i.e., 0.12 should be entered as 12).) Rate of return %