Question 1 How does NX = NCO and how real exchange rate are determined on the foreign exchange market? This is only two sentences.

Question 2 If the long run output equal 2,000,000,000,000 SAR, actual price equal 20 SAR, expected price equal 20 SAR.Assume responsiveness of price to actual output is 1, what is the actual output using the theories of SRAS? How about when expected price equal 25 SAR? Hint: you only need to plug the numbers on the three theories of SRAS.

Question 3 What is the different between budget deficit and investment incentives?You could answer this on only one to two sentences.