5) a) (4 points) Use first derivative test to find the exact value(s) (not calculator values) of local extrema of f(x) = 3x4 - 6x2. b) (4 points) find the exact coordinates of the points of inflection (not calculator values). c) (4 points) Sketch the graph of ((x). On your graph, indicate the coordinates of the following: *-intercept(s), y-intercept, LMAX, LMIN, Inflection point(s). 1(x) is polynomial, So it