Who owns the Kwik-E-Mart in 'The Simpsons'?

In 'The Simpsons', what is the name of the town where the family lives? Who created 'The Simpsons'? Where does Homer Simpson work? What is the name of the bar Homer frequents in 'The Simpsons'? What is the name of Homer's boss in 'The Simpsons'? What is the name of the Simpsons' next-door neighbor? What instrument does Lisa Simpson play? What is the name of the clown on 'The Simpsons'?