A tech startup is trying to optimize its operational efficiency and customer experience by analyzing various time-stamped data.
The team is considering several tasks that might benefit from time series analysis. Given the following tasks, determine which are suitable for time series analysis:
- Task I: Analyzing monthly customer support ticket volume to predict future staffing needs.
- Task II: Understanding the day-to-day variability in website load speed to optimize server resources.
- Task III: Comparing the feature usage rates of the latest app version with the previous version immediately after release.
- Task IV: Identifying patterns in user sign-up rates throughout the year to plan marketing campaigns.
Choose the combination that accurately identifies the tasks suited for time series analysis.