Let .
  1. Find the first and second derivatives.
  2. Identify the graph that displays in blue and dashed and in red.

  3. Using the graphs of and , indicate where is concave up and concave down. Give your answer in the form of an interval. If there is more than one interval separate them with commas. If there are no intervals enter “None”.
    is concave up on
    is concave down on

You can earn partial credit on this problem.