Question: 3. (10 pts) a Modify the grammar in Problem 2 so that the language requires a var to begin with a lower-case letter, followed by

3. (10 pts) a Modify the grammar in Problem 2 so that the language requires a var to begin with a lower-case letter, followed by zero or more lower-case letters or digits. Use BNF, not EBNF. Exactly what grammar rule(s) need to be added? Example: The following should be variables (var): x y books albel sum2 3. (10 pts) a Modify the grammar in Problem 2 so that the language requires a var to begin with a lower-case letter, followed by zero or more lower-case letters or digits. Use BNF, not EBNF. Exactly what grammar rule(s) need to be added? Example: The following should be variables (var): x y books albel sum2

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