Answer and Explanation:
Question: "How will this be done?": To answer this question, the candidate must talk about the entire project to prevent this contamination. That way, he will have to explain the system that will be used and the company that will be responsible for it, as well as present the entire project methodology.
Question: "How long will the implementation of this system take?": In this question, the candidate should continue explaining the methodology of the process, this time highlighting the duration of each phase of the project, taking the opportunity to explain these phrases.
Question: "How will the population benefit from this?": At that moment, the candidate will be able to show the project's objectives, focusing on the benefits that the population will gain from this. It is important to reinforce these benefits, since the project will be implemented with public money, giving the population the right to know how it will benefit.