Problem 4 Phrase Structure Grammar Construct a phrase-structure grammar for the set of all fractions of the form a/b, where a is a signed integer in decimal notation and b is a positive integer. 1. Construct the Backus-Naur rules/form for this grammar? e. Construct a derivation tree for +311/17 to prove that it is a valid symbol in the grammar. vii Show transcribed image text Problem 4 Phrase Structure Grammar Construct a phrase-structure grammar for the
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