y = f(x) 2+ 1+ -3 -2 -1 X -1+4. (6 points) Use the graph of y = f(x) (below) defined on the interval [-2,2) to answer the following questions: (a) Is f continuous at a = 1? (b) Is f differentiable at r = 1? (c) State the interval(s) on which f is differentiable