I always get the wrong answer for these three, can you please provide me the correct answer forFirst(S')First(A)(Please see the picture as well) Consider the context-free grammarS'→A$A → aA|B|XB → bB | CAIn each of the following questions list your set in alphabetical order with $ at the endof the list if it's included. If a set is empty write exactly the word empty. Separateitems using commas and no spaces. For example: x,y,$What is in First(S')? { emptyWhat is in First(A)? {a,λWhat is in First(B)? {IIWhat is in Follow(S')? {What is in Follow(A)? {What is in Follow(B)? {}}|}}|}|}

Context free grammar: It is a formal grammar used to generate all the possible strings in a given…

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can you please provide me the correct answer for First(S') First(A)

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Hi guys, I was told in the class, you can determine wether the CFG grammar is ambiguous by following the predict recursive decent parser's restriction. Please refer to the images. for example G1: the First(aA) = {a} First(a) = {a} First(aA) intersect First(a) != empty set, therefore G1 should be ambiguous, but this is wrong, can I get some explanation why using this restriction rule is not working on this problem, thanks
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