After learning about the components of the balance of payments, how do exchange rates alleviate the current account balance deficit?

What monetary policies can the central bank consider to lessen the deficit?

Looking at the country you have chosen to investigate, what are the advantages and disadvantages to the components of the financial account if the central bank decides to use its foreign reserves to buy its currency in the market?

I need help with those questions :( for the third question, I chose the USA for the country. Please be specific