19. [-/2 Points] DETAILS SCOLALG7 3.2.054.MI. MY NOTES ASK YOUR TEACHER The graph of a polynomial function is given. P(x) = 1x4 - 4x3 X -4 -2 2 -2 (a) From the graph, find the x- and y-intercepts. (If an answer does not exist, enter DNE.) x-intercepts ( x, y ) = (smaller x-value) ( x, y ) = (larger x-value) y-intercept ( x, y ) = (b) Find the coordinates of all local extrema. (If an answer does not exist, enter DNE.) local minimum ( x, y ) = local maximum ( x, y ) =