Question: 4. (8pts) Write a grammar for the language over alphabet fxxz) where each word begins with an x and ends with a z and has

4. (8pts) Write a grammar for the language over alphabet fxxz) where each word begins with an x and ends with a z and has exactly two y's. 5. (8pts) Describe in English the language defined by the following grammar with start symbol S. (Do not just show words in the language, give a definition of the word's pattern

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