4. Whаt fiscаl pоlicies might the gоvernment undertаke tо increase real GDP? (Just tell what these policies are; you do not need to describe their effect on aggregate demand or aggregate supply.) Ignoring any international effects, explain how a fiscal policy designed to increase real GDP affects the interest rate. (While you do not need to draw any diagrams, your explanation must include a description of how the fiscal policy changes the relevant demand curve and/or supply curve and should relate the change(s) to the effect on the interest rate.)