Number of years to provide a given return in the information given in following case, determine the number of years that the given oridinary annuity cash flows must continue in order to provide the rate of return on the initial amount. (Click on the icon here in order to copy the contents of the data table below into a spreadsheet) Initial amount Annual cash flow Rate of return $171,600 $40,929 The number of investment years, n, is years. (Round to two decimal places.) 9%