You need to manage outbound traffic from VNet1 via Firewall1. What is the first step you should take?

To direct outbound traffic from VNet1 through Firewall1, you must create a route table. This route table will contain a custom route (user-defined route or UDR) that specifies Firewall1's private IP address as the next hop for all outbound traffic (0.0.0.0/0). This ensures that traffic leaving VNet1 is forced through the firewall for inspection and policy enforcement. Configuring the Hybrid Connection Manager is for hybrid connectivity scenarios, not for routing within Azure. Upgrading ASP1 to the Premium SKU relates to Azure App Service Plans and has no bearing on network routing. Creating an Azure Network Watcher is for network monitoring and diagnostics, not for traffic management.