A project has the following cash flows: a. What is the NPV at a discount rate of zero percent? (Do not round intermediate calculations and round your answer to the nearest whole number, e.g. 32.) b. What is the NPV at a discount rate of 9 percent? (Do not round intermedtate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. What is the NPV at a discount rate of 17 percent? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your enswer to 2 decimal places, e.9., 32.16.) d. What is the NPV at a discount rate of 29 percent? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)