Note:Regardless of whether you are new to ds/algo prep or are a seasoned veteran looking for practice, consider following this approach it may help organize your thoughts. Grab a fresh notebookFrom the front of the notebook, solve problem and as you solveWrite down the questionWrite down the date/time of when you started and finished.Once you solve, review your answer and reflect the solution.Write that down at the back of the notebook on what clues/hints could have made you solve this faster.Write down any revelations and hints. Now on with the questions: Q1. N-SUM Questions: Questions based on finding elements in an unordered array of integers.

a. Classic 2SUM problem: Given an unordered array of integers, find two numbers that add up to a given target number.

Leetcode link for reference: https://leetcode.com/problems/two-sum/description/

b. Extend 2SUM solution above to 3SUM .. 4SUM?

**Followup questions:**What is the Big O (Time and Space)…