I need a writer who specialises in macroeconomics for this question, which involves the IS-LM-PC model. If there are some calculation procedures and symbols that cannot be typed in word, you can also send me handwritten pictures, but remember to be clear. Please answer the questions with easy to understand theories, you don’t need to be particularly deep and difficult to understand. Please note that the word count for each sub-question is limited to about 470 words and no references are required.