What is the answer to question 17? Thank you

Question 17 1 pts When to harvest an asset: Farmer Ag owns a special species of cotton-producing plant that, if left unharvested, grows a bigger bowl of cotton through time. The NPV, at the end of the year that harvesting takes place, is as follows, e.g. NPV1 is the NPV at the end of year 1. When should Farmer Ag harvest its cotton? Assume a discount rate of 14 percent NPV1 - $55,000 NPV2 - $64,000 NPV3 - $73,000 NPV4 - $77,000 NPV5 = $85.000 DO Harvest at the end of year 1 Harvest at the end of year 2 Harvest at the end of year 3 Harvest at the end of year 4