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Show all your work. Each problem is worth 4pts. Circle (or box) your answers. Do not use L'Hospital's rule, except for problems 12)a)b). 1) Determine the infinite limit. lim Ocsco 2) Evaluate the limit, if it exists. a) lim x - x-6 *-> 4 x -4 1+ x3 . -VI-x3 b) lim *->0 X 3) Find the number at which fis discontinuous. Explain why the function is discontinuous at that number. Sketch the graph of f. (Label appropriate points and intercepts.) 1-x2 if x 1 2 - 4 - 2 2 4 - 2