Help in configuring 4 WANs 1 LAN on RB3011Uis

help would be appreciated , i want to configure 4 WANS and 1 LAN on RB3011UIS . i already have done similar config. on RB750GL but here in this case dual switches and port bridging is confusing me.

please look at the attached image for reference.
4wan.jpg
i have this idea that as far as LAN is concerned i had to make port 6 a master port for ports 7 to 10. … and PORTS 1 to 5 to be acting as routed ports without any switch functionality. please guide me in this scenario.

please explain more what you want

Your thinking is correct when it comes to ROS pre 6.41, post 6.41 “Master Port” functionality is gone, but you will then just bridge ports 6 - 10 and if the only bridge it will have hardware offload

So i have to Configure Port 1 to 5 as ( master-port=none) to make them act as Router ports. So that each port can be configured with separate Subnet/LAN/WAN. IP address ?

Yes, must also not be part of any bridges