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A serverless application built on AWS processes customer orders 24/7 using an AWS Lambda function and communicates with an external vendor's HTTP API for payment processing. The development team wants to notify the support team in near real-time using an existing Amazon Simple Notification Service (Amazon SNS) topic, but only when the external API error rate exceeds 5% of the total transactions processed in an hour. As an AWS Certified Developer Associate, which option will you suggest as the most efficient solution?