1. False: namespaces can have any format as long as they follow the namespace rules.
2. True.
3. True.
4. Use the CloudWatch agent to push the EC2 system logs to CloudWatch logs. All CloudWatch logs have an indefinite retention period, but if separate archiving is required, use the AWS CLI to export older logs to S3 and the n life cycle to Glacier.
5. Use tagging on the environment components, then create an alarm and filter the resources with the tag and CPU utilization. Select the EC2 and RDS systems in the results and create the alarm.

6. A current state of a certain metric (for example, the current CPU usage of an instance).
7. Create a query result alarm from the number of delivered and number of failed messages in SNS to reflect the requirement.
8. Create an alarm with a metric that represents the concurrent user number at the performance ceiling of the RDS service (where the database still responds OK). Once the ceiling is reached, an alarm should be sent to SNS where a Lambda service is subscribed. The Lambda has a role with the permission to manage the RDS service. Create a Lambda function that will increase the instance size accordingly to handle the excess traffic. Create another alarm that represents the users numbers going below the threshold, and configure the Lambda function to decrease the instance size when this second alarm is triggered.