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4. Which of the following characters can occur immediately to the left ofin a sentence of SI2 When one can so occur, give a sentence of SL in which it does when t cannot so occur, explain why. Which of these characters can occur immediately to the right of A' in a sentence of SD when one can so occur, give a sentence of SL in which it does; when it cannot so occur, explain why. a. H *b. & C. d. e