Write each of the following functions as static methods in Java:

static char tic_tac_teo (char[] [] grid): Given a 3x3 grid configuration represented as a two-dimensional array, where each entry is 'X' or 'O', return 'X' if the configuration is a win for 'X', 'O' if the configuration is a win for '0', and 'D' if the configuration is a draw