Which of the following statements about instanceof are correct?
1) instanceof is a binary operator.
2) Assume that class A implements interface B, B b = new A(). Then, the expression "b instanceof A" is true.
3) The following is given: B b = new A(). Then, the expression "b instanceof B" is true.
4) Assume that A is a class and the variable a is of type A (A a;). The expression "a instanceof A" creates an instance of class A.