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- Computer Science Consider the context free grammar (CFG):S -> AB (S being the start symbol)A ->aAb | aabbB -> cBd | cdThe grammar is strong LL(k).a) Determine the value of k.b) As a result of a) above, compute the corresponding look ahead sets (for eachproduction).c) As a result of b) above, write (in C++ pseudo code) the corresponding recursivedescent parser (for the grammar)..4. Explain ambiguity. Do left factoring with the following grammar- Salablabclabcd6. Find an s-grammar for L = {a2nb" :n 2 2}. 7. Convert the grammar S- assb | bSa |a | b| ab into Greibach normal form.
- You are given the following context-free grammar:S → EGF HE → eE | eF → f | EG → gH → hH | hh | eQUESTIONS:1. Convert the grammar into the Chomsky normal form(show all steps of the conversion).2. Use the CYK algorithm to check if the word egehh is inthe language of the grammar.a. Write a BNF grammar for the language consisting of strings built only of the letters a and b. The strings may have any number of these letters, but the letter combinations bb must be in each string somewhere, and each string must start with a aa. For example, the strings aaabbabbba, aaaababba, and aababbabb are in the language, while a, bba, ababb, aabaa, and bbaa are not. b. Draw the parse tree for string aabbaaba according to the previous grammar: c. Describe, in complete English sentences and “layman’s terms,” the language defined by the following grammar in BNF (start symbol is <S> ): <S>::= <A>a|<B>b <C>::= c <A>::= a<A>a|<C> <B>::= b<B>b|<C>A) Write a BNF grammar for the language consisting of strings built only of the letters a and b. The strings may have any number of these letters, but the letter combinations bb must be in each string somewhere, and each string must start with a aa. For example, the strings aaabbabbba, aaaababba, and aababbabb are in the language, while a, bba, ababb, aabaa, and bbaa are not. B) Draw the parse tree for string aabbaaba according to the previous grammar: C) Describe, in complete English sentences and “layman’s terms,” the language defined by the following grammar in BNF (start symbol is <S>):<S> ::= <A>a | <B>b<C> ::= c<A> ::= a<A>a | <C><B> ::= b<B>b | <C>
- 1. Consider the following Grammar S- E E – TE' E' → +E |-E | ɛ | F → id | num T - FT' T' → *T | /T | E a) Is it ambiguous? b) is it left recursive? c) is it LL(1) grammar?Eliminate left recursion in the following grammar Sb/C > AaG(E):E->E + T | T T->T*F | FF->(E) | digitConstruct a parser for grammar E by YACC-BISON, compute the value,and print the result.Design the attribute grammar: + and * operator can only be used for integers,else errors should be reported. code should be submitted as well. Please add explanation. PLEASE DONT COPY AND PASTE THE OTHER SOLUTION ON CHEGG BECAUSE IT ISNT THE FULL ANSWER
- Topic: Parsing Problem 2. Consider the following context-free grammar What is the language L described by the grammar? Compute the first sets for S, X, and Y. You must show the iterations of the algorithm separately Compute the follow sets for S, X, and Y. You must show the iterations of the algorithm separately Construct the LL(1) parsing table for the grammar. It is enough to just show the table Show the steps in parsing the strings from LComputer Science Please do this on PAPER Use the Bison framework to build a DFA state machine for each of the following grammars. Identify any possible conflicts causing the bottom-up parsing to fail. Make sure to complete the missing closures in each state. expr → expr '+' term | expr '-' term | term term → term '*' primary | primary primary → ID | '(' expr ')' | '-' primary expr → expr '+' term | term term → term '*' primary | primary primary → ID | '(' expr ')' expr → expr '+' term | expr '-' term | term term → term '*' primary | primary primary → ID | '(' expr ')' | '-' primary | ID '(' expr ')'Use the logic in the program below to design a Recursive Descent parser in Cfor the following grammar:S →aABA →Abc | bB →d The program below is designed to parse the grammar below. Use the program below as a template and rewrite it so it can parse the grammar above /*Recursive Descent Parser for the expression grammar S -> (L) | a L' -> ,SL | ε L -> SL' */ #include <stdio.h>#include <string.h>int S(), Ldash(), L();char *ip;char string[50];int main() {printf("Enter the string\n");scanf("%s", string);ip = string;printf("\n\nInput\t\tAction\n ------------------------------\n");if (S()){printf("\n------------------------------------------------\n");printf("\n String is successfully parsed\n");}else{printf("\n ------------------------------------------------\n");printf("Error in parsing string\n");}}int L(){printf("%s\t\tL →SL' \n", ip);if (S()){if (Ldash()){return 1;}elsereturn 0;}elsereturn 0;}int Ldash(){if (*ip == ','){printf("%s\t\tL' →, SL' \n", ip);ip++;if…