6. You are considering a project that requires $13,000 investment. The project will provide annual cash inflows of $4,500,$5,700, and $8,000 at the end of each year for the next three years, respectively a) What is the payback period? b) Whatis the present value of these cash flows, given a 9 percent discount rate? c) What's the net presentvalue (NPV)? 2 d) What's the IRR? (Write out the formula with numbers, no calculation needed)