Welcome to lesson 4.2. This is an extended quiz that will allow you to revise aspects of the course so far. Please do take your time and answer if you can without notes. You may take the quiz as many times as you like and can log-on at home to re-try if you wish. At the end of each question should appear the lesson reference in case you need to go back to a lesson for help. Good luck. Your mid-term examination will be next week.