Ruben invested $1800 per year in an IRA each year for 5 years earning 15% compounded annually. At the end of 5 years he ceased the IRA payments, but continued to invest his accumulated amount at 15% compounded annually for the next 4 years. a) What was the value of his IRA at the end of 5 years? Answer = $

b) What was the value of the investment at the end of the next 4 years? Answer = $