Q2 Joe deposits 20 today and another 40 in five years into a fund paying simple interest of 6% per year. Tina will make the same two deposits, but the 20 will be deposited n years from today and the 40 will be deposited 2n years from today. Tina's deposits earn an annual effective rate of 5%. At the end of 15 years, the accumulated amount of Tina's deposits equals the accumulated amount of Joe's deposits. Calculate n.