Find a phrase-structure grammar for each of the following languages: context-free   A. the set consisting of the bit strings 10, 01, and 101 B. the set of bit strings that start with 00 and end with one or more 1s C. the set of bit strings consisting of an even number of 1s followed by a final 0 D. the set of bit strings of at least length 2 that have neither two consecutive 0s nor two consecutive 1s

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