A growth manager at a health app company is tasked with two different types of analyses to help guide the product and marketing strategy. Consider the following tasks:
- Task I: Analyze the daily active user trends over several months to understand the app's usage patterns and peak activity times.
- Task II: Identify the average session duration and frequency of use across different age groups and regions to tailor user experience improvements.
Which of the tasks would involve the data transformation technique of grouping and aggregating data?