Question 5 7 points Find the open intervals on which the function f (x) = -92:2 + 10x + 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: (-infinity, 5/9) decreasing: (5/9, infinity) Find the local maximum and minimum values of the function f (x) = -9x2 + 10x + 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 answe 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 "x in the "there is" drop-down menu. At x = sin (a) ? 5 88 9 , there is a local maximum At x = sin (a) OO ? NA