Suppose that due to a fall in the world interest rate, the equilibrium consumption of tradables, CT (r, QT1 , QT2 ), increases by 10 percent. Assume that prior to the fall in the world interest rate the economy was operating at full employment. Show that the equilibrium real wage also increases by 10 percent. Show that this result is independent of the exchange rate arrangement. To answer this question, you can use a graphical or a mathematical approach.