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20. Consider the grammar shown below. The symbols, e+t*ID are sentential form in the grammar. A parse tree of the sentence is also shown below.

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20. Consider the grammar shown below. The symbols, e+t*ID are sentential form in the grammar. A parse tree of the sentence is also shown below. How many phrases are shown in the parse tree? e t e e+t t 1 1 1 1 1 1 t f f t*f (e) ID e e + t ID a. 1 b. 3 C. 2 d. 4

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