2. (6 pts) Consider the system for which you have designed both use case and class diagram, and write the following constraints in natural language: a. A precondition for attemptExam b. A postcondition for attemptExam) 3. (10 pts) Compare and contrast Waterfall Software Development Lifecycle and Scrum. 4. (8 pts) List the activities performed, and the outputs obtained at each software development phase. Copy the table onto your paper by hand. Phase Name Activities Outputs Requirements elicitation Requirements analysis System design Object design BELOW QUESTIONS SHOULD BE ANSWERED VERY SHORTLY. 5. (6 pts) Define "Driver" and "Stub" in testing context. 6. (6 pts) Explain implementation inheritance and specification inheritance. 7. (4 pts) Describe baseline and milestone shortly. 8. (4 pts) Describe coupling and cohesion 9. (4 pts) What is the difference between 3-tier architecture and MVC? 10. (5 pts) Describe briefly what we mean by the term "design pattern". How are the design patterns described, i.e., pattern elements? Give names of two design patterns except Adapter and Observer