A working code on cpp for Four-in-a-row You will recognize four-in-a row as a two-dimensional version of the classic game, Connect Four. The game board consists of a 7 x 6 grid. Seven columns of six squares each. Instead of dropping counters as in Connect Four, players mark the grid with Xs and Os as in tic-tac-toe. Rules: The first player places an X in the bottom square of any column. Taking turns, players make their mark in any column, as long as it is in the lowest square possible. Winning: The first player to get four-in-a-row vertically, horizontally, or diagonally wins classes, separated into a header file and implementation files: 1- GameManager that owns a board and 2 players and runs the game and swap turns. 2- Player that represents a generic game player that has a name and can do x, y moves 3- An abstract game Board with functions to be defined in children for rules of the game. 4- A RandomPlayer that returns a random x, y move. This framework is suitable for building multiple board games like X-O and similar ones. It shows the power of OOP in reusing existing code to build new apps with less effort. You are given an example X-O game implementation that includes the following classes: 5- X_O_Board represents the board of X-O and the rules for that game. 6- X_O_App is an application that creates a GameManager with X_O_Board and 2 players and runs the X-O game. and tested all in main.