Find the open intervals on which the function f (a) - -9ac- + 8xc + 2 is increasing or decreasing. Note: Use the letter U for union. To enter oo, 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 (xc) = -9x2 + 8x + 2. 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 " -" 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