The banking system in Chuckistan has limited reserves, and the central bank of Chuckistan has become concerned about a steep decline in investment spending. (a) Identify an open market operation that Chuckistan central bank is likely to implement to address the decline in investment spending. (b) Draw a correctly labeled graph of the money market and show the effect of the central bank's policy identified in part (a) on the nominal interest rate. (c) Explain the effect of the change in the nominal interest rate shown in part (b) on aggregate demand in the short run. (d) If the banking system in Chuckistan instead had ample reserves rather than limited reserves, identify a policy action the central bank is likely to implement to address the decline in investment spending