Q2. Write a program to find the sum and average of all numbers in a list. pythonnumbers = [10, 20, 30, 40, 50] Q3. Create a list of numbers and sort it in descending order without using sort() method.

Python’s built-in data structures—like lists, tuples, sets, and dictionaries—are the backbone of efficient, readable, and scalable code. Knowing when and how to use each can drastically improve ...