Intervals of Increasing & Decreasing with Absolute Value graphs

SOLVED: Please help!Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the total extrema of f(x) = x^4 4x 3.Select the correct choice below and, if necessary, fill in the answer box to complete your choice.A. The function is increasing on [Type your answer using interval notation. Type integers or simplified fractions. Use a comma to separate answers as needed.].B. The function is never increasing.Select the correct choice below and, if necessary,

How to Find the Increasing or Decreasing Functions?