In response to the financial crisis that started in 2008, many countries, both developed and developing, have resorted to plans to contain the fall in aggregate demand and the increase in unemployment and the protection of their markets. One of the countercyclical instruments most used by countries that issue international currencies during the crisis was monetary expansion, in addition to fiscal expansion. From these considerations, answer, based on theory

What is the term "currency war" about, which emerged in international forums during the financial crisis?

Explain how monetary expansion in developed countries influences the exchange rate of these countries and reflects in developing countries.

Explain how increased government spending in a country influences its own short-term exchange rate.

From this effect on the exchange rate, what is the expectation for the Trade Balance in the short term, and in the long term? Explain from the IS-LM or DD-AA models.

How's everybody doin' in this quarentine?