Discuss what is meant by System Development Life Cycle (SDLC) and prototyping [30%].

Discuss what is meant by System Development Life Cycle (SDLC) and prototyping [30%]. For what types of system development projects might prototyping be especially useful [10%]? What are the advantages of prototyping and of SDLC [30%]? And what are the risks of each [30%]?