Which of the following is a good example of a constructor according to the definition presented in class? Select all that apply.

1. public Student() {

id = 0;

name = "";

}

2. public void Student() {

id = 0;

name = "";

}

3. public void Student(int sId, String sName) {

id = sId;

name = sName;

}

4. public Student() {

id = 0;

}

5. public Student(int sId) {

id = sId;

name = "";

}

second question

Fill in the missing line of code to complete the below Linked List method:

/** * Returns the current length of the list

* @return the length of the list */ public int getLength() { [Fill in One Missing Line Here] }