Given (6 pts) Use the limit definitiоn оf а derivаtive аt a pоint to show that f is not differentiable at a=-3 (in upload submission only). (4 pts) Sketch the graph of f and f ' (in upload submission only). Input the final answer in the given space below. (2 pts) The interval(s) on which f is continuous is [a]. (2 pts) The interval(s) on which f is differentiable is [b]. (2 pts) True/False? [c]. If a function is continuous on an interval (a,b), then it is differentiable on (a,b). If the statement is false, provide a specific counterexample. [d]