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A company has a PROD, DEV, and TEST environment in its software development department, each contains hundreds of EC2 instances and other AWS services. There was a series of security patches that have been released on the official Ubuntu operating system for a critical flaw that was recently discovered. Although this is an urgent matter, there is no guarantee that these patches will be bug-free and production-ready. This is why a DevOps engineer was instructed to immediately patch all of their affected EC2 instances in all the environments, except for the PROD environment. The EC2 instances in their PROD environment will only be patched after the initial patches have been verified to work effectively in their non-PROD environments. Each environment also has different baseline patch requirements that you will need to satisfy. How should the DevOps engineer perform this task with the LEAST amount of effort?