I need help completing this java code

Skill Practice with these end-of-chapter questions 10.10.1 Multiple Choice Exercises Questions 7,10,11 10.10.4 Identifying Errors in Code Question 31 10.10.5 Debugging Area Questions 33,34,35 10.7 ProgrammingAstvity 2: Using Polymorphism In this Programming Activity, you will complete the implementation of the Tortoise and the Hare race. The Tortoise runs a slow and steady race, while the Hare runs in spurts with rests in between. Figure 10.14 shows a sample run of the race. In this figure, we show only one tortoise and one hare; however, using polymorphism we can easily run the race with any number and combination of tortoises and hares The class hierarchy for this Programming Activity is shown in Figure 10.15. The code for the Racer class, which is the superclass of the Tortoise and Hare classes, is shown in Example 10.20. The Racer class has three instance variables (lines 10-12): a String ID, which identifies the type of racer; and rand y positions, both of which are ints. The class has the usual construc- tors, as well as accessor and mutator methods for the x and y positions and ID. These instance variables and methods are common to all racers, so we