Write a class for the city database using unordered lists. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x and y coordinates. Your database should allow records to be inserted, deleted by name, and searched by name or coordinate. Implement the database using an array-based list. Develop a simple test (as the main function) Run your program and present the results of the test.

Create a method that checks if two sets of integers are equivalent by writing a function to compare them. If two lists are drastically different, the method should highlight the greater of their maximum values.

Write a Java program to implement the following: Ask the user to enter the names of 3 Books and store them in an ArrayList called Book  Remove the second book from the list  Add the user to enter a new book name and store to be the first book of the list  Ask the user to enter a book name, search for it in list, and print “exist” or “not exist”  Print the book name at index 2  Print all list items using loop  Print the size of the list

Provide a different implementation of ChoiceQuestion. Instead of storing the choices in an array list, the addChoice method should add the choice to the question text. For this purpose, an addLine method has been added to the Question class. Use the following files: Question.java /**   A question with a text and an answer.*/public class Question{   private String text;   private String answer;    /**      Constructs a question with empty text and empty answer.   */   public Question()    {      text = "";      answer = "";   }    /**      Sets the answer for this question.      @param correctResponse the answer   */   public void setAnswer(String correctResponse)   {      answer = correctResponse;   }    /**      Checks a given response for correctness.      @param response the response to check      @return true if the response was correct, false otherwise   */   public boolean checkAnswer(String response)   {      return response.equals(answer);   }    /**      Add a line of text to…