Below you have a set of randomly placed numbers.[br][br]Each set corresponds to a set of numbers: Natural (N), Integer (Z), Rational (Q) and Real (R).[br][br]Follow the directions below.

1. What is the smallest set and what is the largest set?[br][br]2. If a number in Integer, is it included in any other set?[br][br]Look up the definition of each set of numbers and answer:[br][br]3. Can an integer be written as a rational number? And as a real number?