8. You are considering an investment that requires an upfront payment of $8,500. In return it pays $1,400 at the end of the first year, $2,500 at the end of the third year, plus an undisclosed amount after five years. If the appropriate rate of return for such an investment is five percent, calculate what the undisclosed amount should be at the end of year five to make this investment worthwhile. The undisclosed amount should be $_to make this investment worthwhile