Which of the following regular expressions recognizes the language of all strings from {a,b} * such that the number of as is 2 mod 4 ( {w]w € {a,b}*, # _(w) mod 4 = 2}). a O a. b* ab* ab* + aa*b*aa*b* O b. b* aab ○ c. b* ab * ab * (b* ab*ab* ab* ab *) * O d. b* ab *a(a+b)*+b*ab* ab * ab *a(a+b) *

* Assignment: Longest increasing subsequence  *  * Sequences are a natural source of computational problems. One such  * family of problems involves finding subsequences with specified  * properties in a given sequence. This exercise asks you to write  * a program that, given a sequence  *  *   s(0), s(1), ..., s(n-1)  *  * of integers as input, finds a ___longest increasing subsequence___  * of the sequence s.  *  * For example, suppose we are given as input the sequence  *  *    72, 16, 51, 17, 6, 21, 92, 59, 54, 78, 41, 33, 94,  *        85, 83, 56, 2, 46, 57, 44, 73, 6, 47, 47, 0.  *  * In this sequence, a longest increasing subsequence has length 7.  * One example of such an increasing subsequence is  *  *    16 < 17 < 21 < 54 < 56 < 57 < 73.  *  * More generally, your program must be such that  * given a sequence  *  *   s(0), s(1), ..., s(n-1)  *  * of integers as input, the program returns a subsequence  *  *   s(i_1), s(i_2), ..., s(i_k)  *  * that meets all…

requried in php

Using C++ Language   Write a program to implement the following: • Declare two C-strings str1 and str2 of appropriate sizes. • Use strcpy() to copy the string “Hello World.” into str1 • Using a suitable message, read the user input into str2. The user may enter more than one word. • Determine and store the length of both char arrays using strlen() • Check if both char arrays are the same length using the stored lengths o If they are the same length, tell the user they are the same length o If they are not the same length, tell the user the strings are different and end the program using a return statement. • Compare both strings using strcmp to check if they are the same string. o If they are the same string, inform the user of this o If they are not the same string, inform the user of this o Note that you compare only if they are of the same length, hence the return statement in the earlier step.