Which of the following is the correct way to define a variable of the type struct Emp declared below?

struct Emp
{
    private String name; 
    private int age; 
    private Single sal;
}

1. Emp e(); e = new Emp();
2. Emp e = new Emp;
3. Emp e; e = new Emp;
4. Emp e = new Emp();
5. Emp e;

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