An investment has an installed cost of $827,450. The cash flows over the four-year life of the investment are projected to be $319,745, $304,172,$245,367, and \$229,431. a. If the discount rate is zero, what is the NPV? Note: Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32 . b. If the discount rate is infinite, what is the NPV? Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32. c. At what discount rate is the NPV equal to zero? Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16