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True or False. Briefly explain. a. If L1 and L2 are context free, then it is possible that L1 N L2 is not context free.
True or False. Briefly explain.
a. If L1 and L2 are context free, then it is possible that L1 N L2 is not context free. b. If L1 U L2 is a context free language, then L1 and L2 must be context free. c. The context-free languages are closed under union with the regular languages. d. The regular languages are closed under intersection with the context-free languages
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