Tasks - Indexing & Slicing

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1. Write a function that takes a string and returns a new string consisting of its first and last character.
2. Write a function that reverses a given string.
3. Given a string, extract and return a substring from the 3rd to the 8th character (inclusive).
4. Write a function that returns every second character from a given string.
5. Write a function that replaces the middle third of a string with asterisks. If the length of the string is not divisible by 3, adjust the middle third accordingly.
6. Write a function that checks if a given string is a palindrome (reads the same backward as forward).
7. Given an email address, extract and return the domain.
8. Write a function that returns every third character from a given string.
9. Write a function that extracts and returns characters at even indices from a given string.
10. Write a function that skips every second character and then reverses the resulting string.

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