Please answer all 3 questions

' Find the intervals on which f(x) is increasing and the intervals on which f(x) is decreasing. Then sketch the graph. _" l Add horizontal tangent lines. .5 f(x)=712x+6x2x3 _ J M 5'3. Select the correct choice below and, it necessary, ll in the answer box to complete your choice. 0 A- The function is increasing on E]. (Type your answer using interval notation. Use a comma to separate answers as needed.) 0 B. There is no solution