Query Azure Devops - Story duration (from start to close) within the last 90 days

Hi,

I want to create a query (or a graph), whatever that gives me this information. The days in average that each team (we have different teams) took in the last 90 days to complete a story (from active to close). In this time frame, just stories that were started and close should count, not stories that started but were not closed or stories that were closed but not started during this time frame.

Does anyone know how can I create the query/graph?

Thanks so much in advance,