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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

All nate specialties are offered at two levels, a. journeyman and master. b. installation and service. c. apprentice and journeyman. d. heating and air conditioning.

Which color produces a calming effect on the mind a. pink b. blue c. red d. white e. green