1. By using the extension methods OrderBy(...) and ThenBy(...) with lambda expression, sort a list of students by their first and last name in descending order. Rewrite the same functionality using a LINQ query.
2. Write a program that prints to the console all numbers from a given array (or list), that are multiples of 7 and 3 at the same time. Use the builtin extension methods with lambda expressions and then rewrite the same using a LINQ query.