I've been trying to write ra5.cpp for a couple days now, but I really don't know where to start or what to do. Please assist.

You are given a copy of "lex.h. from Programming Assignment 1, and a file called 'tokensListing.cpp" as a driver program. DO NOT CHANGE ncither "Icx.h" nor "tokensListing epp". Your implementation should include the following in another file. called 'RA.5.cpp': - The function Lexltemin_ur_kvicunst stringse lexerne, int linerumi; ikl_or_kw 3 function accepts a reference to a string of a lexeme and a line number and returns a Lexitem object. It searches for the lexeme in a directory that maps a string value of a keyword to its corresponding Token valuc, and it returns a Lexltem object containine the keyword Token if it is found. Otherwisc, it returns a Lexltem object cuntaining a tukeri lor one af the pussitle lypes uf idenlifers li.e., IDENT, SIDENT, ur NIDENT). - The overloaded operator function operatores for Lexitem. ostrearn operator ... : Co. 1 - Lisitkenscaa > ... Line 8 : Co. 1 Lisitkensira > ... Lire 8: Co. 1