The points x1, x2, x3, x4, x5, x6, x7, x8, x9 are on the function f(x).
a) Find the point(s) where the slope of the function is zero.
b) Find the point(s) where the slope of the function is largest.
c) Determine the sign of f'(x) and f''(x) at the points x1, x2, x3, x4, x5, x6, x7, x8, x9.
d) Find the point(s) where the sign of f'(x) and f''(x) are the same (both positive or both negative).
e) Find the point(s) where the sign of f'(x) and f''(x) are opposite.
