This method will sell the seat in row i and column j unless it is already sold. A ticket is sold if the price of that seat in the array is 0. If the ticket is not sold, add the price of the seat in row i and column j to the totalSales and then set the price of that seat to 0 to designate it has been sold and return true since a sell was made. If the ticket was already sold, then return false.

The solution code is written in Java.

public class Movie { private double [][] seats = new double[5][5]; private double totalSales; public Movie () { for (int i = 0; i < this. seats. length; i++) { for (int j = 0; j < this. seats[i]. length; j++) { this. seats[i][j] = 12; } } this. totalSales = 0; } public boolean bookSeat (int i, int j) { if (this. seats[i][j]! = 0) { this. totalSales + = this. seats[i][j]; this. seats[i][j] = 0; return true; }else{ return false; } } }

Explanation:

The method, bookSeat (), as required by the question is presented from Line 16 - 26 as part of the public method in a class Movie. This method take row, i, and column, j, as input.

By presuming the seats is an two-dimensional array with all its elements are initialized 12 (Line 7 - 10). This means we presume the movie ticket price for all the seats are $12, for simplicity.

When the bookSeat () method is invoked, it will check if the current price of seats at row-i and column-i is 0. If not, the current price, will be added to the totalSales (Line 19) and then set the price to 0 (Line 20) and return true since the ticket is successfully sold (Line 21). If it has already been sold, return false (Line 23).