hark the correct statements below - marking an incorrect statement will reduce your grade: Answers: Software development proceeds through the following stages in the given sequence: specification, design, implementaton, testing and evolution. In incremental software development, a different process model may be adopted for developing each software increment. An agile software development process is always incremental. In a project in which an agile development process is adopted, contract monitoring may be difficult because of frequent changes of plans and requirements. Pre-conditions of an activity indicate the conditions that may not hold before an activity is carried out. A process model is an abstraction of the activities, their organization and artifacts, as well as actors, represented from the viewpoint of developers, users, or other stakeholders. The waterfall process model requires that users provide feedback at every stage of development. A plan-driven process is one in which the process model to be adopted is specified before a project starts, whereas in an agile process, the process model is developed as the project is carried out. In agile software development, at each increment, the whole project plan is reviewed at a general level, and the present iteration is planned in detail. The waterfall process is preferred for the reason that it is convenient for contract preparation and monitoring