Mysql dynamic query in stored procedure

CREATE PROCEDURE `test1`(IN tab_name VARCHAR(40),IN w_team VARCHAR(40))
BEGIN
SET @t1 =CONCAT("SELECT * FROM ",tab_name," where team='",w_team,"'");
 PREPARE stmt3 FROM @t1;
 EXECUTE stmt3;
 DEALLOCATE PREPARE stmt3;
END

or

CREATE PROCEDURE `test1`( IN tab_name VARCHAR(40), IN w_team VARCHAR(40) )
BEGIN
  SET @t1 = CONCAT( 'SELECT * FROM ', tab_name, ' where team = ?' ); -- <-- placeholder
  SET @w_team := w_team;

  PREPARE stmt3 FROM @t1;
  EXECUTE stmt3 USING @w_team; -- <-- input for placeholder
  DEALLOCATE PREPARE stmt3;
END;