Need help with the following Sports Economics questions

Go to the EPL website (https://www.premierleague.com/tables) and for the seasons 2019/20 and 2020/21, compute the standard deviation of winning percentage and the ratio of actual to ideal standard deviation. Was competitive balance in 2020/21 season better or worse than it was in 2019/20 season? Please show workings. Did the Herfindahl-Hirschman Index (HHI) for the EPL over the tenyear period (2011/12 to 2020/21) improve or not compared to the ten-year period (2006-2007 to 2015-2016). The HHI value for tenyear period (20062007 to 20152016) is 0.34. Please show workings. Based on your discussions and calculations, elaborate/conclude on the level of parity in the EPL