What is the process followed in the waterfall model? 1) Requirements analysis → Design checking → Implementation and unit testing → Integration and system testing → Maintenance regression testing 2) Design checking → Requirements analysis → Implementation and unit testing → Integration and system testing → Maintenance regression testing 3) Implementation and unit testing → Requirements analysis → Design checking → Integration and system testing → Maintenance regression testing 4) Requirements analysis → Implementation and unit testing → Design checking → Integration and system testing → Maintenance regression testing
