Macroeconomics Marginal Revenuing Equals Marginal Cost Quesitons

I’m working on a economics multi-part question and need the explanation and answer to help me learn. 1.Consider this statement: “When marginal revenue equals marginal cost, total cost equals total revenue, and the firm makes zero profit.” Do you agree or disagree? Explain. First question please use online source explain 100-200 words2.2.Summarize the article about Labor Market Equilibrium, and another should relate the summary to Macroeconomics.