please explain your reasoning behind the answers to these questions so that I can apply it to future problems. (a)At what x-value(s), if any, is f(x) continuous, but not differentiable? (b) At what x value(s), if any, does f(x) have a local minimum and maximum? (c) give an interval where f(x) is decreasing and increasing? (d) give an interval(s) where f(x) is concave down and up?

3. Use the following graph of f(x) on the interval (-8,8) to determine the following items. If a question has no solution, write the word "NONE" in the answer box. (Please put your answers in the loves provided.) -2