Consider the following cash flows: a. What is the NPV at a discount rate of zero percent? Note: 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 11 pereent? Note: Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16. c. What is the NPV at a discount rate of 21 percent? Note: A negative answer should be indicated by a minus sign. Do not round intermedlate calculations and round your answer to 2 decimal places, e.g, 32.16 . d. What is the NPV at a discount rate of 31 percent? Note: 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