please answer the following questions based on macroeconomics

Question 3 B In answering the question, you should emphasize the line of reasoning that generated your results; it is not enough to list the results of your analysis Include correctly labeled diagrams, if useful or required, in explaining your answers. A correctly labeled diagram must have all axes and curves clearly labeled and must show directional changes. Assume that yesterday the exchange rate between the euro and the Singaporean dollar was 1 euro = 0.58 Singaporean dollars. Assume that today the euro is trading at 1 euro = 0.60 Singaporean dollars. a. How will the change in the exchange rate affect each of the following in Singapore in the short run? i. Aggregate demand. Explain. ii. The level of employment. Explain, b, Suppose that Singapore wants to return the exchange rate to 1 euro = 0,58 Singaporean dollars. i. Should the Singaporean central bank buy or sell euros in the foreign exchange market? ii. Instead of buying or selling euros, what domestic open-market operation can the Singaporean central bank use to achieve the same result? Explain