Consider the function below. (Give your answers correct to 2 decimal places.) 514-6 flr) = 51, (a) Find the critical numbers of f(if any). If there are no critical numbers, enter NONE. l: (b) Find the open interval on which the function is increasing. (If you need to enter 00 or -oo, type INFINITY or -INFINITY.) (c) Find the open intervals on which the function is decreasing. (If you need to enter co or -oo, type INFINITY or -INFINITY.) ( , ) (leftmost interval, smallerx value) ( , ) (rightmost interval, larger X value) (d) Apply the First Derivative Test to identify the relative extremum. ( , )