A) In response to the prompt, it's important to highlight that an increase in tariffs would disrupt the equilibrium by reducing both the quantity of goods traded and the overall real GDP. Properly labeling the graph would enhance clarity and understanding of the analysis. B) Utilizing the spending multiplier formula to close the GDP gap requires not only showing the numerical calculations but also explaining the process step by step. By demonstrating the application of the formula with specific numbers, the student can provide a clearer understanding of how changes in spending impact GDP. C) Similarly, demonstrating the tax multiplier formula with numerical examples and explaining its application would strengthen the response. By showcasing the calculations and detailing how the tax multiplier works, the student can effectively illustrate how changes in taxation influence overall economic activity and help eliminate the GDP gap