5. Convert the below BNF into EBNF. \[ \begin{array}{l} \langle\text { program } angle ightarrow \text { begin }\langle\text { stmt_list } angle \text { end } \\ \langle\text { stmt_list } angle ightarrow\langle s t m t angle \\ \mid\langle s t m t angle ;\langle\text { stmt_list } angle \\ \langle\text { stmt } angle ightarrow\langle\text { var } angle=\langle\exp \text { ression } angle \\ \langle\text { var } angle ightarrow A|B| C \\ \langle\exp \text { ression } angle ightarrow\langle\operatorname{var} angle+\langle\operatorname{var} angle|\langle\operatorname{var} angle-\langle\operatorname{var} angle|\langle\operatorname{var} angle \\ \end{array} \]