Management Hierarchy

There are three levels of management hierarchy: strategic, managerial and operational. 

Part 1: Review at least 4 academically reviewed articles on each management hierarchy. Summary the articles in your own words.(4 articles are: Strategic, Managerial, Operational and Operating systems)

Part 2: Discuss how the three levels of management hierarchy: strategic, management, and operational relates to the mission of a business.

Part 3: As an IT professional, how would you use information technology to improve the efficiency the three levels of management hierarchy?

Must be in APA format and citations are must. Minimum 700 words