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An application runs on Amazon ECS instances in an Auto Scaling group behind an Application Load Balancer. An issue has occurred where instances are failing to respond to requests and are failing HTTP target group health checks. A DevOps engineer has reviewed the configuration and noticed that the application has failed on some EC2 instances and error messages relating to memory usage have been logged in the system logs of affected instances. The application may have a memory leak and the DevOps engineer needs to take steps to improve the resiliency of the application. Monitoring and notifications should be enabled for when issues occur. Which combination of actions will meet these requirements? (Select TWO.)