1. Define System Design? (1 mark 2. What are the three most essential skills of system designer? (6 marks 3. What are oops classes and objects? (4 marks 4. Which oops concept is used as reuse mechanism, and why? (4 marks 5. Every programming language has reserved words. What does it mean by reserved words? Give some examples on each? (10 marks 6. Describe what happens if you omit the following in .java programs: (1 marks each 6.1. Public 6.2. Static 6.3. Void 6.4. args