Melbourne Trams- Division

The W- class trams are still used for the free city circle tram route, with trams travelling around the city in both directions. It takes a tram 60minutes to complete the loop. There are 10 trams on the route together. How often does a tram pass by each stop? How many trams would be need to be on route to ensure a commuter never had to wait longer than 5minutes at their stop? What about 4 minutes, 3 minutes, 2 minutes, 1 minute?