Please help with the diagram to get same network from 3 ports

Hi there, I am trying to set a network provided by a fiber ISP, please see diagram below - using 4 go-coax converter to send internet into 3 different existing coax ports.

Can you please help me here whether this will work? if so, how can I have the 3 wifi routers joining the same network, so the devices connected to all 3 routers can be discoverable among each other.

Also ISP provide static IP address and which device should I assign the static IP, is it the gocoax1 below or each of the wifi router?

Thanks a lot!