In order to create a JSON object of the happiness index for major EU cities over the past 5 years, we will first create a Python dictionary with the required data and then convert it into a JSON object. It is important to note that this data is not real; you should replace it with real data. ```python import json happiness_index = { "2017": { "Paris": 7.5, "Berlin": 7.2, "Rome": 6.8, "Madrid": 7.3, "London": 7.0 }, "2018": { "Paris": 7.4, "Berlin": 7.3, "Rome": 6.9, "Madrid": 7.2, "London": 7.1 }, "2019": { "Paris": 7.6, "Berlin": 7.4, "Rome": 7.0, "Madrid": 7.3, "London": 6.9 }, "2020": { "Paris": 7.3, "Berlin": 7.2, "Rome": 6.9, "Madrid": 7.1, "London": 6.7 }, "2021": { "Paris": 7.7, "Berlin": 7.5, "Rome": 7.2, "Madrid": 7.4, "London": 7.0 } } # Convert the dictionary to JSON format happiness_index_json = json.dumps(happiness_index) print(happiness_index_json) ``` This code snippet will generate a JSON object containing the happiness index of major EU cities for the past 5 years. You can replace the values with real data, and add more cities or adjust the years as needed.