Hello, please help me with this! Thank you! This question is about Quantitative Methods: Forecasting

Since the Covid-19 outbreak, the use of sports facilities and venues has dropped significantly. You have a group of friends who are frequent visitors to a swimming pool and they are interested in understanding the impact of Covid-19 on the income of the swimming pool operator. Knowing that you have learned the knowledge related to making forecasts, your friends ask for your opinion on the following questions. Please use relevant data below to answer the following questions.

Variable	2016 1Q	2016 2Q	2016 3Q	2016 4Q	2017 1Q	2017 2Q	2017 3Q	2017 4Q	2018 1Q	2018 2Q	2018 3Q	2018 4Q
Swimming Pool Attendances	70,624	70,558	89,561	72,729	68,326	73,466	80,331	65,911	69,520	66,513	84,040	65,742

Data continuation

2019 1Q	2019 2Q	2019 3Q	2019 4Q	2020 1Q	2020 2Q	2020 3Q	2020 4Q	2021 1Q	2021 2Q
61,844	62,068	71,068	60,606	44,728	2,671	19,047	27,126	28,464	25,625

Question: Comment on the underlying pattern in the swimming pool attendances over 2016 1Q - 2019 4Q. (10 marks)