$(4$ pt$)$ Which of the following statements are$/$is true about grammars?

Group of answer choices

not every programming language has grammar

language types are determined by their grammars

G $=\{$S$->$SS$,$ S$->$ab$,$ S$->$ba$,$ S$->\}$ is an example of a context free grammar

we can only generate a finite number of strings from a grammar