Ifferentiaitng between market structures

Write a 1600 words paper synthesizing, summarizing and analyzing the market structures (perfect competition, monopoly, monopolistic competition, oligopoly. Use examples if possible and address the following:
Identify the market structure of Apple. Evaluate the effectiveness of this structure.
Analyze how organizations in each market structure maximize profits.
What is the implication of the elasticity of demand for sales promotion and customer loyalty.
How did the market structure emerge? What barriers may have given rise to the structure? Were there economies of scale?