shorter variable names used here for readability bp boardplayer check for marks across rows columnsand diagonals return (( [' '= [' '= [' '=por across top ( [' '= [' '= [' '=por across middle ( [' '= [' '= [' '=por across bottom ( [' '= [' '= [' '=por down left ( [' '= [' '= [' '=por down middle ( [' '= [' '= [' '=por down right ( [' '= [' '= [' '=por diagonal ( [' '= [' '= [' '= )diagonal def isboardfull(board) """return true if every space on the board has been taken "" for space in all_spaces if board[space=blank return false if any space is blankreturn false return true no spaces are blankso return true def updateboard(boardspacemark) """sets the space on the board to mark "" board[spacemark if __name__ ='__main__' main(call main(if this module is runbut not when imported exploring the program try to find the answers to the following questions experiment with some modifications to the code and rerun the program to see what effect the changes have what happens if you change xoblank ' '' 'on line to xoblank ' '' '' what happens if you change board[spacemark on line to board[spacex what happens if you change board[spaceblank on line to board[spacex project #