Write a function called checkTicTacToe that takes in a 3x3 matrix and returns the value specified in the response key.
Use this response key: return "X" or "O" when that player has won, "Tie" when the board is full with no winner, and "In Progress" otherwise. Empty cells are represented by "."; assume the matrix contains a valid board state.
def checkTicTacToe(board):