I couldn't get the answer for c). I got everything else

Consider the function f (=) - z + 12x 3 (a) Find the domain of f (z) Note: Use the letter U for union. To enter oo, type infinity with a lower case i. Domain: (-infinity, infinity) (b) Give the horizontal and vertical asymptotes of f (z), if any. Enter the equations for the asymptotes. If there is no horizontal or vertical asymptote, enter NA in the associated response area. horizontal asymptote: NA vertical asymptote: NA (c) Give the intervals of increase and decrease of f (I). Note: Use the letter U for union. To enter oo, type infinity with a lower case i If the function is never increasing or decreasing, enter NA in the associated response area. increasing: decreasing: d) Give the local maximum and minimum values of f (z). Enter your answers in increasing order of the z-value. If there are less than two local extrema, enter NA in the remaining response areas and corresponding drop-down menu. Include a multiplication sign between symbols. For example, a . T. f( - 512 256 is a local maximum. f( o is a local minimum. (e) Give the intervals of concavity of f (2) Submit Assign NPI 1043270150