Need asap ! what has code that is freely available for use or modification?

When copying and pasting text, the first step is move your cursor type the text select the copy command select the paste command

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

How do you take a green screen out of the video while editing?