Two distribution switches run HSRP for VLAN 20. SW1 is configured with priority 150 and preempt; SW2 uses the default priority and preempt. SW1 is the active router. The network team wants SW1 to give up the active role automatically if its WAN uplink (GigabitEthernet0/1) goes down, so traffic fails over to SW2 which has an independent WAN path. Which configuration on SW1 accomplishes this?