The figure shows the graph of the derivative f' of a function f. Find the critical points of f and determine whether they are local minima, local maxima, or neither. y = f' (x) 6+ 2 Give your answers in the form of a comma-separated list. Express numbers in exact form. Use symbolic notation and fractions where needed.) local minimum located at x = local maximum located at x = critical points that are neither a local maximum nor local minimum located at x =