90, help pls.

11) The response of the economy to fiscal policy a. Use an IS-LM diagram, show the effects on output of a decrease in government spending. Assume central bank is interest rate targeting. Can you tell what happens to investment? Why? Now consider the following IS-LM model: Cza+a(Y-T) I=bo+ bi Y-bai Z=C+I+G i= i b. Solve for equilibrium output when the interest rate is i". Assume a + bi