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We need to prepare infrastructure for ECS tasks and EC2 instances. It has to span across at least two Availability Zones. These workloads require outbound internet access to download updates and call external APIs. However, inbound access is not allowed. Additionally application should send data to S3 in cost effective way and so we have to deploy necessary infrastructure for that traffic too.

Note: You are required to design the VPC networking architecture only. Creation of ECS clusters, services, or EC2 instances is not part of this task.