Consider the function below. (Give your answers correct to 3 decimal places.) f(.r) = 914 231' + 5 (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 decreasing. (If you need to enter co or -00, type INFINITY or -INFINITY.) Find the open interval on which the function is increasing. (If you need to enter co or -oo, type INFINITY or -INFINITY.)