Extracting custom reports from Alfresco

[BlueFlame BlueFlame]

Good day Team,

Please how can I create a custom reports to extract the number of files uploaded to alfresco by a user using a specific document indexing name. 

For example: the number of documents with index name "PO" uploaded to alfresco by a user with name "John".

I look forward to hearing from you.

Thanks and BR,

Ejike