Let G Be the Phrase-Structure Grammar with Vocabulary $\{ S \rightarrow A B a , S \rightarrow B a , A \rightarrow a B , A B \rightarrow b , B \rightarrow a b \}$

question 22

Short Answer

Let G be the phrase-structure grammar with vocabulary V={A, B, a, b, S} , terminal element set T={a, b} , start symbol S , and production set P= $\{ S \rightarrow A B a , S \rightarrow B a , A \rightarrow a B , A B \rightarrow b , B \rightarrow a b \}$ - Which of these are derivable from ABa?
(1) ba ,
(2) abb ,
(3) aba ,
(4) b ,
(5) aababa

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