3. a) Rank the projects based on each of the following metrics: Payback period, Discounted payback period, NPV, IRR, Profitability Index, and MIRR. (10 points) b) David believes that the best approach to make the decision is the NPV approach. However, Liz is not so sure that ignoring the other metrics is a good idea. Which of the approaches or metrics would you propose? In other words, would you prefer one or more of these approaches over the others?I Explain why. (20 points)