Use Backus-Naur form to deseribe the syntax of expressions in infix notation, where the set of operators and identifiers is the same as in the BNF for postfix expressions given in the preamble to Exer. cise 33 , but parentheses must surround expressions being used as factors. | Numerade

SOLVED:Give production rules in extended Backus-Naur form that generate all decimal numerals consisting of an optional sign, a nonnegative integer, and a decimal fraction that is either the empty string or a decimal point followed by an optional positive integer optionally preceded by some number of zeros.