How Can I calculate Average Time to Abandoned(min), Number of Repeat Calls, Number of Calls Transferred Elsewhere, and Number of Unique Callers.

I'm utilizing the Analytics API https://analytics.ringcentral.com/business-analytics to retrieve aggregated call data, and I'm currently building a dashboard for my team. However, I'm encountering challenges in obtaining accurate data for the following metrics: Average Time to Abandoned(min), Number of Repeat Calls, Number of Calls Transferred Elsewhere, and Number of Unique Callers. Could someone provide the actual formulas for these metrics?