(bUab)*(aUba)*. 2. Exhibit a string over the alphabet {a,b} that does not belong to Justify your answer. (No formal proof is needed.) Hint: You may want to construct an NFA for this regular expression.

Question 4 You will be given a String S which contains only two characters - A and B. Your task is to find some substring patten P in that string. The pattern P is - a substring will contain an equal number of A and B in each side. For example, in AABAABBAA, we get AB, AABB, BA, BBAA. In this problem, you have to print each pattern P present in the string S along with their frequency. Finally, print the largest pattern P. If there are multiple largest patterns, print the one that came first. Sample Input I. AABAABBAА Sample Output AB - 2 times BA - 2 times AABB - 1 times BBAA - 1 times Longest Pattern -AABB

Q3. Let E = {a, b}. Let BDFA = {(M)| M is a DFA that accepts some string containing an equal number of as and bs). Show that BDFA is decidable. (Hint: remember the different results/theorems about CFLs, provide a semi-formal discussion/argument)

Finish the 2 "TODO" in the ASM Language! A palindrome is a word that is spelled the same way forwards and backwards. For example, "radar", "racecar", "civic", "kayak", and "madam" are all palindromes. The definition can be extended to phrases and sentences when ignore case and punctuation, but for this exercise we will stick to a single word. The starter code provided uses the C library functions printf and scanf to prompt for an input a word. The word that is entered from the keyboard is a null-terminated string placed in the byte array at address buf. There are also two output strings provided at addresses str_is_palindrome and str_is_not_palindrome. The starter code provided simply outputs the string at str_is_not_palindrome. The code contains two TODO comments... At the first TODO comment, the byte array at buf is filled with input from the keyboard. This input is a null-terminated character string (i.e. the array contains the characters entered on the keyboard, followed by ASCII…

DO NOT COPY ANSWER FROM ANOTHER QUESTION LEAVE IF you cannot do it perfectly. Otherwise, I will not only DOWN the vote but also REPORT you to the official Chegg team.I won't stop calling Chegg until they really pay attention to this trash behavior. Write a structurally recursive function (prefix->postfix exp) that takes as input an expression in the same little language as Problem 4. prefix->postfix returns an expression of the same form as its input, except that all function applications have been reversed. Finish this Racket code below to answer the question above.(define prefix->postfix(lambda (exp)))

Question 1: Find all the strings and a regular expression for L = {VwV: V, wE {a, b)*, |V|= 2}. Question 2: Find a regular expression for L= {wE {0, 1)* : w has exactly one pair of consecutive zeros}

Regular expression to NFA to DFA conversion: Describes the process of taking a unique regular expression, converting that regular expression to an NFA, then converting the NFA into a DFA. Your regular expression must have at minimum two union, two concatenation, and two Kleene star operations. As followed, concatenations of single charaters can be condensed. Your regular expression cannot be a solved problem from any book. You should describe the regular expression with both processes to convert the regular expression to an NFA and the conversion of that NFA into a DFA.

make the step clearly and on paper please

PLease answer both question with clear explanastion. Thanks in advance 1. What is the regular expression for the language, over alphabet {a, b}, of strings that start and end with the substring ab and contain one or more repetition of the substring bab.2. Describe in English the language associated with the following regular expression: (a+b)*a(a+b)*a*(a+b)*a(a+b)*

Need help with this question. Thank you :)