For each of the following statements determine if the statement is TRUE, FALSE, or UNCERTAIN. You must justify your answer either graphically or mathematically. No credit will be given without an explanation. [6 points each] (a) "Starting from long-run equilibrium, if the economy experiences lower oil prices (a positive supply shock), the Federal Reserve should adopt a contractionary monetary policy if they want to move the economy back to potential output more rapidly." (b) "In the Solow Model with no technological progress, a decrease in the depreciation rate will raise the steady-state level of capital per worker (k*)." (c) "According to Okun's Law, if the unemployment rate were to increase by 2 percentage point (i.e. if the unemployment rate increases from 4.8% to 6.8%), then real GDP would be predicted to decrease by 1%" (d) "In the IS-LM model the real interest rate will fall, but output will increase if the price level (P) falls."