Identify the open intervals on which the graph of the function is increasing or decreasing. Assume that the graph extends past what is shown. y 50 40+ 30- 201 10- A -10-8 -4 -6 -20 -10- -20- -30 40 -50 2 4 6 8 10 x Note: Use the letter U for union. To enter co, type infinity. Enter your answers to the nearest integer. If the function is never increasing or decreasing, enter NA in the associated response area. increasing: decreasing: