You have a resource group RG1 and a virtual network VNet1. You must deploy Azure Firewall into RG1 with minimal administrative effort. What should you do first?

To deploy Azure Firewall, a dedicated subnet named AzureFirewallSubnet is required within the virtual network where the firewall will reside. This subnet must have a specific name and a minimum size of /26. Creating this subnet first ensures the necessary network infrastructure is in place for the firewall deployment. Creating a secured virtual hub named AzureFirewallHub is incorrect because Azure Firewall can be deployed as a standalone resource in a VNet, not just within a Virtual WAN hub. Creating a new virtual network named AzureFirewallNetwork is unnecessary; the firewall can be deployed into an existing VNet (VNet1 in this case) as long as the required subnet exists. Creating a new resource group named AzurFirewellRescurceGroup is also unnecessary; the firewall can be deployed into the existing resource group RG1.