Use a graph below of f(x) = In(4x* + 1) to estimate the z-values of any critical points and inflection points of f (I). critical points (enter as a comma-separated list): z = inflection points (enter as a comma-separated list): r Next, use derivatives to find the x-values of any critical points and inflection points exactly. critical points (enter as a comma-separated list): 7 == inflection points (enter as a comma separated list): r