For the function and graph below, complete the following. y=8-x-x2 y 101 9 4 2 x -4 -2 2 4 -2 The xy-coordinate plane is given. The curve enters the window in the third quadrant, goes up and right becoming less steep, crosses the x-axis at approximately x = -3.4, changes direction at the approximate point (-0.5, 8.3), goes down and right becoming more steep, crosses the y-axis at y = 8, crosses the x-axis at approximately x = 2.4, and exits the window in the fourth quadrant. Identify x-values for which y' > 0. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) Identify x-values for which y' < 0. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) Identify x-values for which y' = 0. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) x = Identify x-values for which y' does not exist. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) x =