Provide a CFG for basic regular expressions over the vocabulary { 0, 1} with the usual regex notation of left-associative justaposition used for concatenation, left- associative infix | used for alternation, and postfix unary* used for Kleene closure. The operators should have the usual precedence. The grammar should allow the use of parentheses in the usual fashion to override the default associativity and precedence. And Transform your grammar to be suitable for recursive-descent parsing. Provide pseudo-code for a recursive-descent recognizer for this transformed grammar.

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