For each of the following questions use the graph of the function and its derivative to determine: a the x-coordinate of points of inflection; b. intervals of concavity; c. the x-coordinate of points where maximum or minimum values of the derivative occur; d. intervals where the slopes of the tangents to the graph of the function are increasing, e. intervals where the slopes of the tangents to the graph of the function are decreasing. y = f '(x ) y = f(x) X