Cache Purge API for purging cache set by workers

Developers Workers
1

Is it possible to use the Cache purge API to selectively purge the cache that was set by workers using respective keys?

3

If you’ve set the cache key in the worker, then only the worker can purge by that cache key. More detailed info is here:

https://developers.cloudflare.com/workers/reference/how-the-cache-works/#purge-assets-stored-with-the-cache-api

4

Can worker B purge the cache set by worker A? If not, then how can I purge the cache that was set by a worker on demand?