Intro: Talk about RBA, policy objectives and briefly introduce monetary policy and its stances
Body : - Expansionary stance, how is it done? (policy corridor), impact on interest rates, mention how a decreased cash rate causes consumption and investment to increase. Then use AD formula to prove how that leads to AD and economic growth. Give eg of expansionary stance
-Monetary policy: Vice versa, pretty much same as expansionary except with opposite effect
-Limitations of mon pol: Eg time lag, global influences
Conclusion: sum up intro plus any other things you deem important which are mentioned in bodies.
In bodies, good to mention target band as well.
Good luck!