Define and explain the Aggregate Demand Curve. Identify, define and explain in d

Define and explain the Aggregate Demand Curve. Identify, define and explain in d

Define and explain the Aggregate Demand Curve. Identify, define and explain in detail the four components of Aggregate Demand.  Explain in 200 words or more.   
Explain in details why wages may be sticky downward. Explain in 200 words or more.
Discuss whether or not indexing wages benefit every worker equally? Explain in detail, why or why not?  Explain in 200 words or more.