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Find the open intervals on which the function f (x) = -11x- + 12x + 7 is increasing or decreasing. Note: Use the letter U for union. To enter co, type the word infinity. If the function is never increasing or decreasing, enter NA in the associated response area. increasing: decreasing: Find the local maximum and minimum values of the function f (z) - -11z- + 12x +7. Enter your answers in increasing order. . If there is just one local maximum or minimum value, then in the second row below enter NA as the answer for "z =" and select NA in the "there is" drop-down menu. . If there are no local maximum or minimum values, then in both rows below enter NA as the answer for "r =" and NA in the "there is" drop-down menu. At 1 = d sim there is a local maximum At = = there is a local minimum