Mini Case 3.5: Nielson Motors has a debt-equity ratio of 1.8, an equity beta of 1.6, and a debt beta of 0.20. It is currently evaluating the following projects, none of which would change Nielson's volatility. (All amounts are in millions.) a) Which of the projects should Nielson Motors accept based on profitability ratio (NPV/investment)? b) What is the total debt overhang associated with accepting project 4? c) If Nielson Motors invests in only those projects which are beneficial to the stockholders, then what is the total debt overhang associated with accepting these project(s)