Q11

Let $G$ be a context-free grammar where $G=(\{S, A, B, C\}, \{a, b, d\}, P, S)$ with the productions in $P$ given below. $S \rightarrow ABAC$ $A \rightarrow aA \mid \varepsilon$ $B \rightarrow bB \mid \varepsilon$ $C \rightarrow d$ ($\varepsilon$ denotes the null string). Transform the grammar $G$ to an equivalent context-free grammar $G'$ that has no $\varepsilon$ productions and no unit productions. (A unit production is of the form $x \rightarrow y$, and $x$ and $y$ are non terminals).