f(x)=x^(3) 3x^(2)-9x 2
(1) Find
f^(')(x)
(2) 2. Find critical numbers Use the first derivative test to find local extrema of
f
. (1) 4. Find
f^('')(x)
(2) Use the second derivative test to find intervals where graph is concave up or concave down. (3) Find coordinates of the points of inflection. (4) Sketch the graph of
f
Please solve and explain