(10.1) In this first question we would like you to assess - with a brief explanation - whether the following four statements are correct or false (a) According to Okun's law, the inflation rate falls when the growth rate of produc- tion exceeds its natural level. (b) In the medium-run equilibrium, the nominal interest rate i is such that inflation is always equal to zero. (c) Expansionary fiscal policy is more effective, i.e., leads to a bigger increase in output, everything else equal in case of an interest rate targeting central bank (horizontal LM curve) compared to a money supply targeting central bank (upward sloping LM curve). (d) An increase in energy prices leads to higher real wages and thus a higher natural rate of unemployment.