Statistics for Project and admin project


I would like to obtain complete statistics concerning the use of “gitlab ce” according to projects and groups (for example : which project showed the highest activity rate ? to obtain information about the different groups, get top 10 of the most active projects, etc).

Would it be possible for you to tell me what manipulation I have to make to get answers to my questions ?

Moreover, is it possible for a user named “owner” to create user accounts giving access to projects though not being webmaster/administrator of the gitlab ?

Thank you very much for your answer.

Best regards

(Gitlab version v11.5.4)