Edit intro in README

Edit Q4 part in README

Edit graphs' title, size

Edit index columns and run through all cells

Edit markdown cells and comments

Modified cleaning steps in Q4-movie duration file

Edit README, Q3 part picture

Edit README, Q3 part

Edit the final result correlation plots

Edit markdowns and correlation plots in Q3 file

Edit markdown cells in Q3 file

Deleted data cleaning steps

Edit README file picture and description for Q1

Edit README file

Edit markdown and comments in Q2-genre notebook