help me activate hotspot on rb2011

i wanna activate hotspot on eth6(ip range 10.5.50.0/24) and if someone conected on internal network(eth2-5) and i set on ip leases to hotspot range (10.5.50.1) this guy get the hotspot network

i have a rb 2011:
eth1 is the gateway
eth2-5 bridge - internal network with dhcp 192.168.0.0/24

eth6 hotspot
address list.png
bridge.png
hotspot.png
route list.png