Use mikrotik to expand network

Hello good people… I’m using the rb951 to expand a network so I’m going to be using the same ssid to create an essid network, turn off dhcp on the connected routers. The net. I have the following issues to clarify please

  1. Can i use the poe port to build the network? Is that port bridged with port 2 to 5 so that i just run one cable to the device.

  2. Do i need wds? Or setting the ssid and credentials same, turning off dhcp is sufficient

  3. The existing hotspot supports about 50 users, can this be increased?

  4. Will thr existing hotspot affect the expansion

I will appreciate your prompt assistance and any important information you may have for me.

Thanks

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