An investment has an installed cost of $638,400. The cash flows over the four-year life of the investment are projected to be $236,800, $257,380, $225,320, and $167,410. If the discount rate is zero, what is the NPV? If the discount rate is infinite, what is the NPV? At what discount rate is the NPV just equal to zero? A A Year 0 Year 1 Year 2 Year 3 Year 4 A (638,400) 236,800 257,380 225,320 167,410 A A Discount rate Complete the following analysis. Do not hard code values in your calculations. You must use the built-in Excel functions to answer this question. NPV at zero percent NPV at an infinite interest rate Zero NPV discount rate