The following model describes the economy of the planet Caladan. Assume that Caladan has been in a long run equilibrium for some time. M = AD: Y 300+10 SRAS: Y=Y+P Pe P Y-Y Okun's Law: =-2(u-u") Potential output: Y = 400 Y Natural rate of unemployment: u" = 0.04 Money supply: M = 90 = a. Suppose that the central bank of Caladan increased the nominal money supply to M- 123.6, and this expansionary monetary policy was unanticipated by the public. Please graphically illustrate the impact of this monetary policy shock on P and Y in the short run and long run using the AD-AS model. Then, calculate the short run and long run equilibrium values of Y, P, and u after the shock. Remember to label your graph carefully and explain your answer in detail. b. Now suppose that the central bank announced their intention to increase the money supply well in advance of the actual policy move. How would that change your answers to part a above? Please explain your response in detail, use graphical analysis to support your answer if necessary.