DHCP SERVER AND NEW VLAN10 CONFIGURATION

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Dear All i need help on USG110 DHCP SERVER CONFIGURATION and CONFIGURE VLAN10 ON PORT P5 OF USG110 .

On the vlan10 should i create it first Configuration → Object → Zone to add a zone for THE VLAN 10. If so should put it an IP address befeore i go to configuration to create the VLAN10?

When i go to Configuration → Network → Interface → VLAN create the vlan10 on the ip assignment what IP address i should used?

On the DHCP SERVER can you assist me DHCP SERVER STARTING IP?