2. Given the function below, find the following exact values: a.f(4,-2) b. f(1, 0) c. fx (4,-2) and fxx (4,-2) 4y² 2x z = f(x,y) = - + 2 continued. Given the function below, find the following exact values: z = f(x, y) = - + x 4y² 2x y2 x d. Based on the values in part c, select the shape that corresponds to the orientation of the function's surface at f(4, -2) in the indicated direction. Circle or underline your selection. Z Z 4 4 4 x x 4 יא x