find the focus and directrix of the parabola with the equation 2004-06-02-06-00 files/ . a. 2004-06-02-06-00 files/ directrix: 2004-06-02-06-00 files/ b. 2004-06-02-06-00 files/ directrix: 2004-06-02-06-00 files/ c. 2004-06-02-06-00 files/ directrix: 2004-06-02-06-00 files/ d. 2004-06-02-06-00 files/ directrix: 2004-06-02-06-00 files/ please select the best answer from the choices provided a b c d