Q. Assume that ex is the exchange rate between the U.S. dollar and the Chinese Yuan in that ex indicates the number of Yuan that can be purchased with one dollar. The demand for dollars, denoted, D$, is given by the equation D$ = 2800 - 200ex. The supply of dollars denoted, S$ is given by the equations S$ = 400 + 100ex

a) Compute the demand for dollars also supply of dollars at the exchange rates between 0 also 12 in increments of one.

b) Graph the demand for dollars also supply of dollars against the exchange rate. Illustrate what is the value of the equilibrium exchange rate

c) Assume the demand for dollars increases by 300 billion at each exchange rate. Explain if the increase in demand results from a large purchase by the Chinese of a new American made airplane or a large purchase by the Americans of new lower priced Chinese made high definition televisions. Compute the new demand for dollar at each exchange rate give the original supply of dollars?

d) Assumed the supply of dollar increases by 600 billion at each exchange rate. Explain if the increase in supply results from a large purchase by the Chinese of a new American made airplane or a large purchase by the Americans of new lower priced Chinese made high definition televisions. Compute the new supply of dollars at each exchange rate also graph the new supply curve. Illustrate what is the new equilibrium exchange rate given the original demand for dollars?