What is rss a)real time story service b) real time story syndication c) really simple syndicationd)rapid story services

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

In my email i got a message it says a quick message and in message details on who its from its says nicole and under nicole is [email protected] -

Whose task it is to ensure that the product flows logically from one step to another?