given the strings s1 and s2 are of the same length, create a new string consisting of the first cahracter of s1, followed by the first character of s2, and so on (in other words the new string should consist of alternating characters of s1 and s2). For example, if s1 contained "hello" and s2 contained "world", the new string would contain "hweolrllod". Assign the new string to variable s3. using python

Given a string str, find the length of the longest substring without repeating characters.  (a).For “ABDEFGABEF”, the longest substring are “BDEFGA” and “DEFGAB”, with length 6. (b).For “BBBB” the longest substring is “B”, with length 1.For “GEEKSFORGEEKS”, (c).there are two longest substrings shown in the below diagrams, with length 7 write code in python

For each item, write a single regular expression that matches that item. Note that in ALL cases, the entire string must match without additional characters. 1. A string of digits that contains only digits and contains exactly two fives. Examples of acceptable strings include: "15445", "55", "05563" o The string should be rejected if it contains anything other than a digits. 2. A regular expression that matches a time expressed in the form "1:45 PM". o The hours part must be a number from 1 to 12, the minutes range from 00 to 59, and the time must indicate either AM or PM (uppercase only and preceded by exactly one space). 3. A regular expression that matches a string representing a comma separated list of variable names such as: hello, get_max, sum3 o A variable name consists of letters, digits, and underscores but cannot start with a digit. o There is exactly one space after every comma. No other spaces are allowed. o Commas and spaces are not allowed before the first name and after…

Ex: Use getline() to get a line of user input into a string. Output the line. Enter text: IDK if I'll go. It's my BFF's birthday. You entered: IDK if I'll go. It's my BFF's birthday. Search the string (using find()) for common abbreviations and print a list of each found abbreviation along with its decoded meaning. Ex: Enter text: IDK if I'll go. It's my BFF's birthday. You entered: IDK if I'll go. It's my BFF's birthday. BFF: best friend forever IDK: I don't know Support these abbreviations: BFF -- best friend forever IDK -- I don't know . JK -- just kidding TMI -- too much information TTYL-talk to you later 1 #include 2 // FIXME include the string Library 3 using namespace std; 4 5 int main() { 6 7 8 9 10 } /* Type your code here. */ return 0; main.cpp