When using Auto Scaling, you want to add or remove ECS instances based on the...

When using Auto Scaling, you want to add or remove ECS instances based on the utilization rate of computing resources. For example, you want to remove one ECS instance when the average CPU utilization rate is not greater than 30%. In this case, you need to set the scaling rule “Remove 1 ECS instance” and ____________ to finish the configuration.