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Need asap write a short paper describing the history and differences between six sigma, waterfall, agile, and scrum models. understanding these models can give you a good idea of how diverse and interesting it development projects can be. describe what the rationale for them is and describe their key features. describe the history behind their development. at least 400 words

Hazel has just finished adding pictures to her holiday newsletter. she decides to crop an image. what is cropping an image?

Which type of entity describes a fundamental business aspect of a database? a. linking b. lookup c. domain d. weak