Use data from the following website to answer the question: "https://www.espn.com/nhl/standings". Note that this landing page takes you to data for the current season, but you can look up data for previous seasons.

a) Calculate the within-season variation in the NHL using data from 2018-2019. This was the last regular season pre-COVID in which 82 games were played. Now, calculate the within-season variation using data from 2021-2022. This was the first regular 82-game season post-COVID. What has happened to the competitive balance (as measured by within-season variation) for the NHL over this Bme period? (Your answer must include the formula for calculating within-season variation.)

b) Now, calculate the within-season variation using data from the 2020-2021 season. This was during COVID and each team only played 56 regular games.

c) Write down the formula used to adjust a within-season variation measure for the actual number of games played. Calculate this value for the 2020-21 season and use it to adjust your within-season variation. (Show all your work.)