4, X50 Y 4x, X >0 d the critical numbers. (Hint: Check for discontinuities.) (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) 0.2 id the open intervals on which the function is increasing or decreasing. (Enter your answers using interval notation. If an answer does not exist, enter DN creasing (0,2) creasing (-00, 0), (2,00) ketch the graph of the function to verify your results