Why won’t ed g enui ty let me move onto the next question? I got it correct but it won’t let me Move onto the next question

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 of the following includes the three primary network access technologies? dsl, cable modem, broadband lan, wan, man voip, uc, iptv tcp/ip, ftp, dhcp

Iam doing microsoft excel and i have do formulas, can some explain to me how do them?