In which fictional town does 'Halloween' (1978) take place?

What is the name of the fictional African country in 'Coming to America'? What is the name of the town where 'Back to the Future' takes place? In which fictional town does 'Jaws' take place? In which fictional town does 'It's a Wonderful Life' take place? What is the name of Luke Skywalker's home planet? What is the name of the ice planet in 'The Empire Strikes Back'? What color is the pill Neo takes in 'The Matrix'? What speed must the DeLorean reach to time travel in 'Back to the Future'?