eBook Consider a project with the following cash flows: year 1, -$400; year 2, $200; year 3, $600; year 4, -$900; year 5, $1,000; year 6, $250; year 7, $230. Assume a discount rate of 15% per year. Round all your answers to the nearest dollar amount. a. Find the project's NPV if cash flows occur at the ends of the respective years. b. Find the project's NPV if cash flows occur at the beginnings of the respective years. $ c. Find the project's NPV if cash flows occur at the middles of the respective years. en