2. 1 mark] Write the BNF grammar rules for the language whose sentences have the following structure This is expressed in EBNF notation, where the superscript indicates one or more occur rences, and the superscript indicates zero or more occurrences. Alternation is expressed by the ( | . . .) construct. An optional symbols are enclosed in square brackets: [. . .]. 3. [1 mark] Consider the following grammar assign-+ id :# expr id A BIO ezprexpr term | term term term *factor | factor factorid | id Now consider the sentence of the grammar A:= _ A + B * C Produce a rightmost derivation of this sentence