Find a) any critical values and b) any relative extrema 9(x) =x-27x +55 a) Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The critical value(s) of the function is/are (Use a comma to separate answers as needed. ) O B. The function has no critical values. b) Select the correct choice below and, if necessary, fill in the answer box(es) within your choice. O A. The relative maximum point(s) is/are and there are no relative minimum points. (Simplify your answer. Type an ordered pair, using integers or fractions Use a comma to separate answers as needed ) O B. The relative minimum point(s) is/are and the relative maximum point(s) is/are (Simplify your answers. Type ordered pairs, using integers or fractions. Use a comma to separate answers as needed.) O C. The relative minimum point(s) is/are and there are no relative maximum points (Simplify your answer. Type an ordered pair, using integers or fractions. Use a comma to separate answers as needed.) O D. There are no relative minimum points and there are no relative maximum points