no excel, full euqations

15. After taking an engineering economics course, an optimist decides that she wants to be rich and that the way to become so is to make use of the earning power of money. If she is to be precisely a millionaire on her 60th birthday and she expects to start her millionaire-making plan on her 22nd birthday, how much will she have to deposit on each birthday through her 59th (including her 22nd) if her investment can earn 15% annually