Suppose the function f(x) has a domain of all real numbers and its derivative is shown below. f'(x) = (x + 4)3 (x 6)7 elx - 11) Find the intervals where f(x) is increasing. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) Find the intervals where f(x) is decreasing. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) S