f(z) = 15(1-5)3, Question 2 part (a) Find the derivative of f(x), writing your answer as quotient (a single fraction). Question 2 part (b) What are the three critical numbers of f(x)? Question 2 part (c) On what intervals is f(x) increasing? Question 2 part (d) On what intervals is f(x) decreasing? Question 2 part (e) Classify the critical numbers of f(x). Question 2 part (f) Sketch the graph of y=f(x). In order to receive full credit, you must use proper graphing techniques, which include . All straight lines, especially axes, must be drawn with a straightedge. . Axes must have arrows. . . Axes must have labels. Both axes must have a clearly shown scale. . The curve y=f(x) should have arrows where appropriate