b) A project requires an investment of 500,000. It has a return of 150,000 at the end of year 1, 90,000 at the end of year 2, 175,000 at end of year 3, 65,000 at end of year 4 and 150,000 at the end of year 5. Find the NPV if the market rate is 8%. (8 Marks)