(1 point) Find the absolute extrema of f(x) =x - 27x over the interval [0, 9]. The absolute minimum occurs at (Enter the coordinates of the absolute minimum as an ordered pair. If the absolute minimum value occurs more than once, enter a comma-separated list, e.g., "(0,1), (1,5), (6,10)". If there is no absolute minimum, enter "none".) The absolute maximum occurs at (Enter the coordinates of the absolute maximum as an ordered pair. If the absolute maximum value occurs more than once, enter a comma-separated list, e.g., "(0,1), (1,5), (6,10)". If there is no absolute maximum, enter "none".)