An investment has an installed cost of $576,382. The cash flows over the four-year life of the investment are projected to be $205,584, $249,318, $197,674, and $165,313. Requirement 1: If the discount rate is zero, what is the NPV? (Do not round intermediate calculations.) Requirement 2: If the discount rate is infinite, what is the NPV? (Do not round intermediate calculations. Negative amount should be indicated by a minus sign.) Requirement 3: At what discount rate is the NPV just equal to zero? (Do not round intermediate calculations. Enter your answer as a percentage rounded to 2 decimal places (e.g., 32.16).)