9-3. A firm is assigned the network part 128.171. It selects an 8-bit subnet part. a) Write the bits for the four octets of the IP address of the first host on the first subnet. b) Convert this answer to dotted decimal notation. (If you have forgotten how to do this, it was covered in Chapter 1.) c) Write the bits for the second host on the third subnet. (In binary, 2 is 10, and 3 is 11.) d) Convert this into dotted decimal notation. e) Write the bits for the last host on the third subnet. f) Convert this answer into dotted decimal notation. Can you tell the subnet a host is on just by looking at the dotted decimal notation representation?

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.