How many stars to give seller for irrelevant DSR feedback metric?

I want to give feedback re a seller from whom I bought an item but I don't know how many stars to give for "seller communication" because we didn't communicate with each other as there was no need to. Therefore, can I skip giving any stars for that, but, if so, would that be taken to mean I'd be giving zero stars as in saying the communication was awful? In which case, I should give five stars as if we'd communicated and it was great, right?

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plpmr
Experienced Mentor

the lowest stars you can give that affects a seller is '1', not giving any has no effect.