Which of the following is a function whose graph is continuous everywhere except at 3 and is continuous from the left at 3? (a) f(x) = x. (b) f(x) (c) f(x) = = (4-x² x-8 (2-x² 13-x if x ≤ 3 if x > 3* if x ≤ 3 if x > 3*

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