and the conchesion in enter the points in in the sign of f" (r) in and y* vestion 8: (6 points) Identify the open intervals on which the graph of the function is concave upward or concave downward. Assume that the graph extends past what is Known. 101 Co uestion 5: (7 points) Find the open intervals on which the function f (x) - -11x2 + 10x + 9 is increasing or decreasing. Note: Use the letter U for union. To enter co, type the word infinity. 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 (x) = -11x2 + 10x + 9 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 "x =" and select NA in th 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 =" and NA in the "there is" dro menu. to = there is to= there is uestion 6: (6 points) 001 17 Find the critical points of the function f (x) = 34x 9 + z 9 enter your answers in increasing order. If the number of critical points is less than the number of response areas, enter NA in the remaining eas. t = c =