To handle deadlocks two main strategies are used: prevention or avoidance. Whereas prevention is relatively easier to implement, dealing with avoidance is relatively more difficult. a) what is/are the difference(s) between the two; b) what makes avoidance not so easy to implement; and c) under avoidance, what is meant by a ‘safe’ state? Discuss each case briefly. (

8. create an abstract student class for parker university. the class contains fields for student id number, last name, and annual tuition. include a constructor that requires parameters for the id number and name. include get and set methods for each field; the settuition() method is abstract. create three student subclasses named undergraduatestudent, graduatestudent, and studentatlarge, each with a unique settuition() method. tuition for an undergraduatestudent is $4,000 per semester, tuition for a graduatestudent is $6,000 per semester, and tuition for a studentatlarge is $2,000 per semester. write an application that creates an array of at least six objects to demonstrate how the methods work for objects for each student type. save the files as student. java, undergraduatestudent. java, graduatestudent. java, studentatlarge. java, and studentdemo. java.