Which of the following lines of code declares a reference to an object? public class Account{ private double balance; // Line 1 // Line 2 public Account( double initialBalance ) { balance = initialBalance, } // Line 4 V/ Line 5 } public class Transactions // Line 9 public static void main(String[] args) { // Line 10 Account checking: 7 Line 11 checking = new Account // Line 12 } } Line 1 Line 2 Line 4 Line 5 Line 9 Line 10 Line 11 Line 12