Question 1 Consider the following Java program. Given an ArrayList a that stores the data items: 27, 18, 9, 37, 21, 25, 4. public class Treesort { ArrayList avlsort (ArrayList a) { AVLTree t = new AVLTree<> (); for (int i = 0; i < a.size (); i++) t.add (a. get (i)); ArrayList ans = t.inOrder (); for (int i = 0; i < ans.size (); i++) System.out.print (ans.get (i) + ", "); // line (a) System.out.println (); return ans; (a) What is the output at line(a)? (b) What is the runtime of the method aviSort in big-O notation if the input ArrayList stores n data items?
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- In java A supermarket wants to reward its best customer of each day, showing the customer’s name on a screen in the supermarket. For that purpose, the store keeps an ArrayList.Create a class customer having id, name, gender, and bill provide appropriate getters/setters and constructors also provide toString method.In the Store class, make an ArrayList of customers, store name, and address implement methods public void addSale(Customer c) that will add customers to the arraylist.public void RemoveCustomer(int id);public void UpdateCustomerRecord(int Id);public displayAll();public String nameOfBestCustomer() to record the sale and return the name of the customer with the largest sale. public ArrayList nameOfBestCustomers(int topN) so that it displays the top customers, that is, the topN customers with the largest sales, where topN is a value that the user of the program supplies. Write a program that prompts following menu and ============================================…We were given the following code to solve a Pentomino puzzle, several methods might need to be added or editted to solve the problem. The program should take in an input of 3 4 5 6 for 3x20 4x15 5x12 6x10 grids. Then output the number of correct solutions for them (respectively its 2, 368, 1010, and 2339) import java.util.ArrayList;import java.util.LinkedList;import java.util.List; public class DLX { class DataNode { DataNode L, R, U, D; ColumnNode C; public DataNode() { L = R = U = D = this; } public DataNode(ColumnNode c) { this(); C = c; } DataNode linkDown(DataNode node) { node.D = this.D; node.D.U = node; node.U = this; this.D = node; return node; } DataNode linkRight(DataNode node) { node.R = this.R; node.R.L = node; node.L = this; this.R = node; return node;…In Java: Given two Arrays of equal length(arrayA & arrayB), for every element in arrayA, add the coresponding element from arrayB that are in the same index. Example: arrayA = {1, 2, 3, 4} arrayB = {2, 4, 6, 8} Output result of the state of arrayA: arrayA = {3, 6, 9, 12}
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