11. Hi! I need help on finding the minimum and maximum of x and what x is! (: thank you so much

Find the absolute extrema if they exist, as well as all values of x where they occur, for the function f(x) = 3x4 + 4x3 - 120x2 -1. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. O A. The absolute maximum is , which occurs at x = (Round the absolute maximum to two decimal places as needed. Type an exact answer for the value of x where the maximum occurs. Use a comma to separate answers as nee O B. There is no absolute maximum