C(Yd) = 105 + 0.8 (Y T) I(r) = 74 1 r G = 65 T = 50

1. Using the information above, write out the planned Aggregate Expenditure equation. (Hint: Remember that this takes the form of AE = . . . .)
2. Write down an expression for the Investment-Savings (IS) Curve. (Hint: First use the AE equation to find an expression for equilibrium Y . Next, remember that the IS equation takes the form of r = ....)
3. Assume that inflation is zero, so that i = r. This economy's central bank follows a given Monetary Policy Rule: r = i = 0.003 Y + 0.001 P where P is the price level. Given this and the expression for the IS Curve, write down an expression for the Aggregate Demand Curve. (Hint: Remember that the AD Curve takes the form P = . . . .)