Need help with these

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

Which set of steps will organize the data to only show foods with more than 100 calories and rank their sugar content from greatest to least?

Which best describes the condition under which the unicode output is the same as plain text ?