[5 marks] Give a recursive definition for the language anb2n where n = 1, 2, 3, ... over the alphabet Ó={a, b}. 2) [12 marks] Consider the following languages over the alphabet ƒ={a ,b}, (i) The language of all words that begin and end an a (ii) The language where every a in a word is immediately followed by at least one b. (a) Express each as a Regular Expression (b) Draw an FA for each language (c) For Language (i), draw a TG using at most 3 states (d) For Language (ii), construct a CFG.

C++ Programming: From Problem Analysis to Program Design
8th Edition
ISBN:9781337102087
Author:D. S. Malik
Publisher:D. S. Malik
Chapter15: Recursion
Section: Chapter Questions
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[5 marks] Give a recursive definition for the language anb2n where n = 1, 2, 3, ... over the alphabet Ó={a, b}.

2) [12 marks] Consider the following languages over the alphabet ƒ={a ,b},

(i) The language of all words that begin and end an a

(ii) The language where every a in a word is immediately followed by at least one b.

(a) Express each as a Regular Expression

(b) Draw an FA for each language

(c) For Language (i), draw a TG using at most 3 states

(d) For Language (ii), construct a CFG. 

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