In September 1992, a speculative attack compelled the United Kingdom to devalue the British pound versus the

Question:

In September 1992, a speculative attack compelled the United Kingdom to devalue the British pound versus the German currency (Deutsche Mark). How did monetary policy in both countries influence this outcome? Plot from 1990 to 1992 the discount rates in the United Kingdom (FRED code: INTDSRGBM193N) and Germany (FRED code: INTDSRDEM193N), and (on the right scale) the of German marks per British pound (obtained by multiplying the number of U.S. dollars per pound (FRED code: EXUSUK) by the number of Deutsche Marks per U.S. dollar (FRED code: EXGEUS)). What do you conclude?

Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...