At a local High School with 4 grades, consisting of 57, 37, 41, 81 students. You are tasked with creating a report on if the number of wins you get in a certain videogame contributes to how much time you spend playing in one session. How would you design an observational study to find out this information? Make sure to include solutions to any confounding variables, and be detailed in how you would collect the data and ensure it is a representative sample of each grade, both genders, and the entire High School