//#1: Explain what will this statement output and why
var x = null;
var y;

console.log(x===null, y==null);

//#2
var foo = {};

console.log(foo.bar);
console.log(typeof foo.bar);

console.log(foo.noSuchProperty);
console.log(typeof foo.noSuchProperty);

//#3 where is "undefined" is defined?
console.log(undefined in this);