Historic communication methods You will find the names of five communication methods below. What year was it invented?
Year
Image
Name
Email
Semaphore
Telegram
Homing/Carrier pigeon
Telephone
Rom

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