What are the three main approaches to the development and implementation of new technologies? (system development, agile development, and prototyping) (define the three as well) what are the major risks about which managers should be concerned when it comes to managing IT projects? How would you know when a projects is successful? For the last question, choose one case from those discussed in the second half of the class, discuss whether you would consider the implementation or technologies discussed there a success, and outline the reasons for your assessment.