Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the relative extrema. f(x) =x* - 12x +5 You must write a complete solution and submit with your written work. Be sure to show your test points and how you tested each interval. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The function is increasing on (Type your answer in interval notation. Type integers or simplified fractions. Use a comma to separate answers as needed.) O B. The function is never increasing. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The function is decreasing on (Type your answer in interval notation. Type integers or simplified fractions. Use a comma to separate answers as needed.) O B. The function is never decreasing. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. (Type integers or simplified fractions.) O A. The function has a relative minimum x = and no relative maximum. O B. The function has a relative maximum at x = relative minimum at x = O C. The function has a relative maximum at x = and no relative minimum. O D. The function has no relative extrema