4. The following table shows the balance sheet of the "People's Bank of China" at the beginning of years 2016 and 2017 . During this year, the Chinese economy grew at around 6%. (a) How much foreign exchange intervention did the CB of China do during this period? (b) Which could be the logic behind this intervention? (c) Explain why the changes to the rest of the assets allow you to say this was an esterilized intervention. (d) Explain how would a non-esterilized intervention have affected liabilities and economic growth