Section $3-20$ points

$3-1$ If a project has a NPV at a $30\%$ discount rate of zero, what does this mean and would you invest in this project.

$3-2$ What is the Rate of Return in the following graph? What is the NPV at $20\%$ discount rate?

$3-3$ On the above graph, if the investment required to get this was $$4$ million, what would be the total investment you could have endured to get a $20\%$ ROR?