Question: I. Write a complete BNF grammar (not EBNF) for identifiers that consist of only letters, digits, and underscores ) such that: (1) the identifiers must

I. Write a complete BNF grammar (not EBNF) for identifiers that

I. Write a complete BNF grammar (not EBNF) for identifiers that consist of only letters, digits, and underscores ) such that: (1) the identifiers must begin with a letter, (2) consecutive underscores are not allowed, and (3) the identifiers cannot end with an underscore

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