how to find NPV and IRR for cash flows

3. Consider the following cash flow, (10 points) Find the missing cash flow (year 5 ) such that the NPV is $400,000 with a discount rate of 12% 4. Consider the following cash flow. (20 points) a) What is the IRR for this project? b) Using the IRR, would you invest in this project if the required rate of return is 7% ? 5. Compare these two projects. (15 points) Which one is a better investment opportunity