Hi, I need help with this Macroeconomics question please, thanks !

Question 3 [6 points] Suppose the central bank's monetary policy sets the interest rate according to the function: i = 6 + 3(TT - TT ) with TI = 3, and aggregate expenditure is: AE = 75 + 0.4Y - 5i a) What is the equation for the ADTT curve? Use 'PI' to represent IT when entering your equation. Y = b) Plot the ADT curve in the graph below. Aggregate Demand Aggregate Demand 9 - 7.5- Inflation Rate (%) 4.5- w 1.5- 25 50 75 100 125 150 175 200 Reset Real GDP