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You have a storage bucket with the following objects:
folder-a/image-a-1.jpg
folder-a/image-a-2.jpg
folder-b/image-b-1.jpg
folder-b/image-b-2.jpg
Cloud CDN is enabled on the bucket, and all four objects are cached. You need to invalidate the cached copies of all objects with the prefix folder-a
using the fewest commands possible. What should you do?