Consider the context$-$free grammar $G=(V,,R,S),$ where $V=\{S,A,B,C,D\},=\{a,b\},$ and $R$ contains following rules.

$SDA|BA|AB|b|$

$AAC|a|$

$DAB|AS|$

$Bb$

$Ca$

Is $G$ in Chomsky normal form? Please justify your answer briefly.

$2.$ Consider the context$-$free grammar $G=(V,,R,S),$ where $V=\{S,A,B\},=\{0,1\},$ and $R$ contains following rules.

$SAB|lon|$

$ABA|AB|BB$

$B0|lon|$

$A1$

Is $G$ in Chomsky normal form? Please justify your answer briefly.