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3. Let L = {(M)| M is a TM that accepts either all or none of the strings of a given length}. Show that L

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3. Let L = {(M)| M is a TM that accepts either all or none of the strings of a given length}. Show that L is undecidable. 4. Let L be the language defined in problem 3. Classify it as (a) decid- able, (b) Turing-recognizable but not co-Turing-recognizable, (c) co-Turing-recognizable but not Turing-recognizable, (d) neither Turing-recognizable nor co-Turing-recognizable. Justify your

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