Report number of opened and closed tickets per month

HI

I am strugling with a very common situation and was not able to found answer in the forum.

I have a table that represents a list of tickets opened in a service center. For each row we have the tichet reference, the opened date and the closed date if the ticket is solved.

Which Power bi model I need to report a graph with opened, closed and still opened tickets ( different between opened and closed) per month ?

Thanks for your help

regards

here is a minimal simple sheet of inial data

Let me know if you need any other clarification.

Regards.