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7. (maxim 25 marks) Prove that the following languages are not context free: (a) (10 marks) (aP-3 1 p is prime,p >5) (b) (10 marks)

7. (maxim 25 marks) Prove that the following languages are not context free: (a) (10 marks) (aP-3 1 p is prime,p >5) (b) (10 marks) (a4nb3 c2n In2 4) (c) (10 marks) (an+2n2 In 2 2)

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