In simple terms, how would you define a protocol?

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

Ideally, the backrest is tilted back slightly, so when you turn the wheel your shoulders are the seat.

What is the opening page of a website called? a. web page b. landing page c. homepage d. opening page