Below are the Car, TreeNode and BSTCar ADTS: public class car private String regno; //car registration number private String name; /ame of car private String company; //manufacturing company private double price; //price of car public Car (..) (...) public String getRegno (...) .{} public String getName(...) (...) public String getBrandCar (..)) public double getPrice (-) (--) public void display...) 1/display all information of car public class TreeNode TreeNode left; Car data; TreeNode right; //definition for other methods public class BSTCar TreeNode root; public BSTCar(); public void displayCar(); public double calcrotalPrice (String); public int countCar(); 1. Write the definition of a method void displaycar() for displaying car information from highest price to lowest price. Write the definition of a method double calcTotalPrice (String) to calculate total price of selected car based on company. II. III. Write the definition of a method int countCar() to calculate number of car registered in California where regno start with 'C