Find the absolute maximum and minimum values of the function, if they exist, over the indicated interval. Also indicate the x-value at which each extremum occurs. 2/3 f(x) - 7x :[ 27.27] Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. The absolute maximum value is at x = and the absolute minimum value is at x = (Use a comma to separate answers as needed.) O B. The absolute maximum value is at x = and there is no absolute minimum (Use a comma to separate answers as needed.) OC. The absolute minimum value is at x = and there is no absolute maximum. (Use a comma to separate answers as needed.) O D. There is no absolute minimum and there is no absolute maximum