docs: Correct spelling mistakes

Author: Janaina-MJ

contributing.md

@@ -1,6 +1,6 @@
 ### Contribution Guide
 - Feel free to contribute to this repo by raising the __pull request__
-- If you do not know to raise pull request, send an email with details to sadypai@gmail.com
+- If you do not know to raise a pull request, send an email with details to sadypai@gmail.com
 - Spelling mistakes, improvement of answers, code comments, rephrasing the questions / points, additional details, quality references and similar contributions are highly appreciated
 
 #### Question contribution
@@ -16,8 +16,8 @@
 
 #### Standards followed
 - No full stop at the end of the question or points
-- Output of the code is mentioned infront of the statement with comments
-- Code comments should be before or after the code in seperate line
+- Output of the code is mentioned in front of the statement with comments
+- Code comments should be before or after the code in a separate line
 - Driver codes are added only when necessary
 - The difficulty level of the question in general increases with the question number
 - Follow the existing format of markdown and code

usageAndStudyGuide.md

@@ -2,7 +2,7 @@
 
 - Familiarity and hands on experience in JavaScript are recommended before attempting these challenges
 - The JavaScript modern interview code challenges are divided into 5 sections topic wise
-- These sections are mututally exclusive for most of the questions and _no ordering_ has to be followed for topics
+- These sections are mutually exclusive for most of the questions and _no ordering_ has to be followed for topics
 - Each section will have list of questions generally from easy to advanced level with _increasing difficulty_
 - All the questions are listed at the top of each section and clicking on the question will land to the answer section
 - Questions might have example which helps to understand the question better