Need help finding any relative extrema (don't know if I'm correct) and identifying any intervals over which the function is increasing or decreasing (in interval notation) thanks

Find any relative extrema of the function. List each extremum along with the x-value at which it occurs. Identify intervals over which the function is increasing and over which it is decreasing. Then sketch a graph of the function. G(X) = -x +x+x+7 Describe any relative extrema. Select the correct choice below and, if necessary, fill in the answer box(es) to 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.) OB. 1 184 The relative minimum point(s) is/are 3' 27 and the relative maximum point(s) is/are (1,8) (Simplify your answers. Type ordered pairs, using integers or fractions. Use fa 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.)