Games : How can I limit each team to have 5 players each and have 2 spectators in my CSGO server?

I currently have a CS:GO server that holds up to 12 players but I don't want to have it so its a 6v6. I would like so the teams are limited to 5 players each and there can be 2 spectators watching until a slot opens up.

If anyone knows a way to do this (preferablly with the.cfg's I would greatly appreciate it. I am running the configs mainly with the server.cfg and gamemode_competitive.cfg