Given the following class diagram, which of the following statements is valid (or correct)? For invalid (or incorrect) ones, explain the reason. > Person Student Section 3. 1. Person p = new Person(); 2. Person p = new Studento; There is an inheritance relationship between Section and Student All variables of Person should be declared public static final 5. Student could have abstract methods The default value for a local variable of type Section is null 4. 6