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A leading club in the Major League Baseball runs a web platform that boasts over 50,000 pages and over 100 million digitized photographs. It is available in six languages and maintains up-to-date information for the season. The engineering team has built a notification system on the web platform using SNS notifications which are then handled by a Lambda function for end-user delivery. During the off-season, the notification systems need to handle about 100 requests per second. During the peak baseball season, the rate touches about 5000 requests per second and it is noticed that a significant number of the notifications are not being delivered to the end-users on the web platform. As a Solutions Architect Professional, which of the following would you suggest as the BEST fit solution to address this issue?